diff --git a/core/modules/modDeclarationTVA.class.php b/core/modules/modDeclarationTVA.class.php
index 53dfcc4..1300c95 100644
--- a/core/modules/modDeclarationTVA.class.php
+++ b/core/modules/modDeclarationTVA.class.php
@@ -473,7 +473,7 @@ class modDeclarationTVA extends DolibarrModules
 
 		// Create tables of module at module activation
 		//$result = $this->_load_tables('/install/mysql/', 'declarationtva');
-		$result = $this->_load_tables('/declarationtva/sql/');
+		$result = $this->_load_tables('/custom/declarationtva/sql/');
 		if ($result < 0) {
 			return -1; // Do not activate module if error 'not allowed' returned when loading module SQL queries (the _load_table run sql with run_sql with the error allowed parameter set to 'default')
 		}
diff --git a/sql/dolibarr_allversions.sql b/sql/dolibarr_allversions.sql
index f5baf73..21013c2 100644
--- a/sql/dolibarr_allversions.sql
+++ b/sql/dolibarr_allversions.sql
@@ -1,380 +1,122 @@
 --
--- DeclarationTVA Module Database Schema
--- French CA-3 VAT Declaration Module for Dolibarr
--- Version: 1.0
--- Created: 2025-01-27
+-- DeclarationTVA MVP Database Schema
+-- Phase 1 - Basic CA-3 Declaration System
+-- Simplified for MVP development
 --
 
 -- =====================================================
--- 1. CORE CONFIGURATION TABLES
+-- 1. CORE MVP TABLES (Simplified)
 -- =====================================================
 
--- Main configuration table for PCG account mappings
+-- Basic configuration table
 CREATE TABLE IF NOT EXISTS `llx_declarationtva_config` (
   `rowid` int(11) NOT NULL AUTO_INCREMENT,
   `entity` int(11) NOT NULL DEFAULT 1,
   `config_key` varchar(64) NOT NULL,
   `config_value` text,
-  `config_type` varchar(32) DEFAULT 'string',
-  `config_desc` text,
-  `is_active` tinyint(1) DEFAULT 1,
   `created_date` datetime DEFAULT NULL,
-  `modified_date` datetime DEFAULT NULL,
-  `created_by` int(11) DEFAULT NULL,
-  `modified_by` int(11) DEFAULT NULL,
   PRIMARY KEY (`rowid`),
-  UNIQUE KEY `uk_config_entity_key` (`entity`, `config_key`),
-  KEY `idx_config_key` (`config_key`),
-  KEY `idx_config_active` (`is_active`)
+  UNIQUE KEY `uk_config_entity_key` (`entity`, `config_key`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
--- PCG Account Mappings - Multiple accounts per CA-3 line
+-- PCG account mappings (multiple accounts per CA-3 line supported)
 CREATE TABLE IF NOT EXISTS `llx_declarationtva_account_mappings` (
   `rowid` int(11) NOT NULL AUTO_INCREMENT,
   `entity` int(11) NOT NULL DEFAULT 1,
-  `ca3_line` varchar(8) NOT NULL COMMENT 'A1, A2, B1, B2, B3, B4, 05, 06, 17, 20, 21, 22, 28, 29',
-  `account_code` varchar(32) NOT NULL COMMENT 'PCG account code from llx_accounting_account',
-  `account_label` varchar(255) DEFAULT NULL COMMENT 'Account description',
-  `vat_rate` decimal(5,2) DEFAULT NULL COMMENT 'VAT rate (20.00, 10.00, 5.50, 2.10, 0.00)',
-  `account_type` varchar(32) DEFAULT NULL COMMENT 'base, vat_collected, vat_deductible, vat_due',
+  `ca3_line` varchar(8) NOT NULL COMMENT 'A1, A2, A3, A4, A5, 08, 09, 9B, 17, 20, 21, 22, 25, 26, 28, 29',
+  `account_code` varchar(32) NOT NULL COMMENT 'PCG account code',
+  `account_label` varchar(255) DEFAULT NULL,
+  `vat_rate` decimal(5,2) DEFAULT NULL,
   `is_active` tinyint(1) DEFAULT 1,
-  `weight` decimal(5,2) DEFAULT 1.00 COMMENT 'Account weighting (default 1.0)',
-  `sort_order` int(11) DEFAULT 0 COMMENT 'Display order',
   `created_date` datetime DEFAULT NULL,
-  `modified_date` datetime DEFAULT NULL,
-  `created_by` int(11) DEFAULT NULL,
-  `modified_by` int(11) DEFAULT NULL,
   PRIMARY KEY (`rowid`),
   UNIQUE KEY `uk_mapping_entity_line_account` (`entity`, `ca3_line`, `account_code`),
   KEY `idx_ca3_line` (`ca3_line`),
-  KEY `idx_account_code` (`account_code`),
-  KEY `idx_vat_rate` (`vat_rate`),
-  KEY `idx_account_type` (`account_type`),
-  KEY `idx_active` (`is_active`)
+  KEY `idx_account_code` (`account_code`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
--- =====================================================
--- 2. PERIOD MANAGEMENT
--- =====================================================
-
--- Declaration periods management
+-- Declaration periods (quarterly only for MVP)
 CREATE TABLE IF NOT EXISTS `llx_declarationtva_periods` (
   `rowid` int(11) NOT NULL AUTO_INCREMENT,
   `entity` int(11) NOT NULL DEFAULT 1,
-  `period_name` varchar(64) NOT NULL COMMENT 'Q1-2024, M01-2024, etc.',
-  `period_type` varchar(16) NOT NULL COMMENT 'quarterly, monthly, annual',
+  `period_name` varchar(32) NOT NULL COMMENT 'Q1-2024, Q2-2024, etc.',
   `start_date` date NOT NULL,
   `end_date` date NOT NULL,
-  `status` varchar(32) DEFAULT 'draft' COMMENT 'draft, validated, submitted, approved, rejected',
-  `is_locked` tinyint(1) DEFAULT 0 COMMENT 'Prevent modifications',
-  `submission_date` datetime DEFAULT NULL,
-  `approval_date` datetime DEFAULT NULL,
-  `rejection_reason` text DEFAULT NULL,
+  `status` varchar(32) DEFAULT 'draft' COMMENT 'draft, validated, submitted',
   `created_date` datetime DEFAULT NULL,
-  `modified_date` datetime DEFAULT NULL,
-  `created_by` int(11) DEFAULT NULL,
-  `modified_by` int(11) DEFAULT NULL,
   PRIMARY KEY (`rowid`),
   UNIQUE KEY `uk_period_entity_name` (`entity`, `period_name`),
-  KEY `idx_period_type` (`period_type`),
-  KEY `idx_period_dates` (`start_date`, `end_date`),
-  KEY `idx_period_status` (`status`),
-  KEY `idx_period_locked` (`is_locked`)
+  KEY `idx_period_dates` (`start_date`, `end_date`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
--- =====================================================
--- 3. DECLARATION STORAGE
--- =====================================================
-
--- Main declarations table
+-- Main declarations table (simplified)
 CREATE TABLE IF NOT EXISTS `llx_declarationtva_declarations` (
   `rowid` int(11) NOT NULL AUTO_INCREMENT,
   `entity` int(11) NOT NULL DEFAULT 1,
   `period_id` int(11) NOT NULL,
-  `declaration_number` varchar(32) NOT NULL COMMENT 'Auto-generated declaration number',
-  `status` varchar(32) DEFAULT 'draft' COMMENT 'draft, validated, submitted, approved, rejected',
-  `declaration_type` varchar(16) DEFAULT 'ca3' COMMENT 'ca3, ca12, ca4, etc.',
+  `declaration_number` varchar(32) NOT NULL,
+  `status` varchar(32) DEFAULT 'draft' COMMENT 'draft, validated, submitted',
   `total_vat_collected` decimal(15,2) DEFAULT 0.00,
   `total_vat_deductible` decimal(15,2) DEFAULT 0.00,
   `net_vat_due` decimal(15,2) DEFAULT 0.00,
   `vat_credit` decimal(15,2) DEFAULT 0.00,
   `submission_date` datetime DEFAULT NULL,
-  `approval_date` datetime DEFAULT NULL,
-  `rejection_reason` text DEFAULT NULL,
-  `xml_data` longtext DEFAULT NULL COMMENT 'XML export data',
-  `pdf_path` varchar(255) DEFAULT NULL COMMENT 'PDF file path',
   `created_date` datetime DEFAULT NULL,
-  `modified_date` datetime DEFAULT NULL,
-  `created_by` int(11) DEFAULT NULL,
-  `modified_by` int(11) DEFAULT NULL,
   PRIMARY KEY (`rowid`),
   UNIQUE KEY `uk_declaration_entity_number` (`entity`, `declaration_number`),
   KEY `idx_period_id` (`period_id`),
-  KEY `idx_status` (`status`),
-  KEY `idx_declaration_type` (`declaration_type`),
-  KEY `idx_submission_date` (`submission_date`),
   CONSTRAINT `fk_declaration_period` FOREIGN KEY (`period_id`) REFERENCES `llx_declarationtva_periods` (`rowid`) ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
--- CA-3 form lines data
+-- CA-3 form lines (simplified)
 CREATE TABLE IF NOT EXISTS `llx_declarationtva_ca3_lines` (
-  `rowid` int(11) NOT NULL AUTO_INCREMENT,
-  `declaration_id` int(11) NOT NULL,
-  `ca3_line` varchar(8) NOT NULL COMMENT 'A1, A2, B1, B2, B3, B4, 05, 06, 17, 20, 21, 22, 28, 29',
-  `line_label` varchar(255) DEFAULT NULL,
-  `base_amount` decimal(15,2) DEFAULT 0.00 COMMENT 'Base HT amount',
-  `vat_amount` decimal(15,2) DEFAULT 0.00 COMMENT 'VAT amount',
-  `total_amount` decimal(15,2) DEFAULT 0.00 COMMENT 'Total amount (base + VAT)',
-  `vat_rate` decimal(5,2) DEFAULT NULL COMMENT 'VAT rate applied',
-  `account_count` int(11) DEFAULT 0 COMMENT 'Number of accounts contributing',
-  `created_date` datetime DEFAULT NULL,
-  `modified_date` datetime DEFAULT NULL,
-  PRIMARY KEY (`rowid`),
-  UNIQUE KEY `uk_declaration_line` (`declaration_id`, `ca3_line`),
-  KEY `idx_ca3_line` (`ca3_line`),
-  KEY `idx_vat_rate` (`vat_rate`),
-  CONSTRAINT `fk_ca3_declaration` FOREIGN KEY (`declaration_id`) REFERENCES `llx_declarationtva_declarations` (`rowid`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
-
--- Detailed account breakdown for each CA-3 line
-CREATE TABLE IF NOT EXISTS `llx_declarationtva_account_details` (
   `rowid` int(11) NOT NULL AUTO_INCREMENT,
   `declaration_id` int(11) NOT NULL,
   `ca3_line` varchar(8) NOT NULL,
-  `account_code` varchar(32) NOT NULL,
-  `account_label` varchar(255) DEFAULT NULL,
+  `line_label` varchar(255) DEFAULT NULL,
   `base_amount` decimal(15,2) DEFAULT 0.00,
   `vat_amount` decimal(15,2) DEFAULT 0.00,
   `total_amount` decimal(15,2) DEFAULT 0.00,
-  `transaction_count` int(11) DEFAULT 0,
   `created_date` datetime DEFAULT NULL,
   PRIMARY KEY (`rowid`),
-  KEY `idx_declaration_id` (`declaration_id`),
-  KEY `idx_ca3_line` (`ca3_line`),
-  KEY `idx_account_code` (`account_code`),
-  CONSTRAINT `fk_details_declaration` FOREIGN KEY (`declaration_id`) REFERENCES `llx_declarationtva_declarations` (`rowid`) ON DELETE CASCADE
+  UNIQUE KEY `uk_declaration_line` (`declaration_id`, `ca3_line`),
+  CONSTRAINT `fk_ca3_declaration` FOREIGN KEY (`declaration_id`) REFERENCES `llx_declarationtva_declarations` (`rowid`) ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
 -- =====================================================
--- 4. EU TRANSACTION HANDLING
--- =====================================================
-
--- EU supplier configuration
-CREATE TABLE IF NOT EXISTS `llx_declarationtva_eu_suppliers` (
-  `rowid` int(11) NOT NULL AUTO_INCREMENT,
-  `entity` int(11) NOT NULL DEFAULT 1,
-  `supplier_id` int(11) NOT NULL COMMENT 'Reference to llx_societe',
-  `country_code` varchar(2) NOT NULL COMMENT 'EU country code',
-  `vat_number` varchar(32) DEFAULT NULL,
-  `is_eu_supplier` tinyint(1) DEFAULT 1,
-  `autoliquidation_enabled` tinyint(1) DEFAULT 1,
-  `transaction_type` varchar(16) DEFAULT 'b2b' COMMENT 'b2b, b2c, special',
-  `oss_threshold` decimal(15,2) DEFAULT 10000.00 COMMENT 'OSS threshold amount',
-  `deb_des_required` tinyint(1) DEFAULT 0,
-  `created_date` datetime DEFAULT NULL,
-  `modified_date` datetime DEFAULT NULL,
-  `created_by` int(11) DEFAULT NULL,
-  `modified_by` int(11) DEFAULT NULL,
-  PRIMARY KEY (`rowid`),
-  UNIQUE KEY `uk_eu_supplier_entity` (`entity`, `supplier_id`),
-  KEY `idx_supplier_id` (`supplier_id`),
-  KEY `idx_country_code` (`country_code`),
-  KEY `idx_is_eu_supplier` (`is_eu_supplier`),
-  KEY `idx_transaction_type` (`transaction_type`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
-
--- EU transaction tracking
-CREATE TABLE IF NOT EXISTS `llx_declarationtva_eu_transactions` (
-  `rowid` int(11) NOT NULL AUTO_INCREMENT,
-  `entity` int(11) NOT NULL DEFAULT 1,
-  `invoice_id` int(11) NOT NULL COMMENT 'Reference to llx_facture or llx_facture_fourn',
-  `transaction_type` varchar(16) NOT NULL COMMENT 'incoming, outgoing',
-  `customer_type` varchar(8) DEFAULT NULL COMMENT 'b2b, b2c',
-  `country_code` varchar(2) NOT NULL,
-  `base_amount` decimal(15,2) DEFAULT 0.00,
-  `vat_amount` decimal(15,2) DEFAULT 0.00,
-  `vat_rate` decimal(5,2) DEFAULT NULL,
-  `autoliquidation_applied` tinyint(1) DEFAULT 0,
-  `deb_des_required` tinyint(1) DEFAULT 0,
-  `period_id` int(11) DEFAULT NULL,
-  `created_date` datetime DEFAULT NULL,
-  `modified_date` datetime DEFAULT NULL,
-  PRIMARY KEY (`rowid`),
-  KEY `idx_invoice_id` (`invoice_id`),
-  KEY `idx_transaction_type` (`transaction_type`),
-  KEY `idx_customer_type` (`customer_type`),
-  KEY `idx_country_code` (`country_code`),
-  KEY `idx_period_id` (`period_id`),
-  CONSTRAINT `fk_eu_period` FOREIGN KEY (`period_id`) REFERENCES `llx_declarationtva_periods` (`rowid`) ON DELETE SET NULL
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
-
--- =====================================================
--- 5. WORKFLOW INTEGRATION
--- =====================================================
-
--- Workflow triggers and automation
-CREATE TABLE IF NOT EXISTS `llx_declarationtva_workflow_log` (
-  `rowid` int(11) NOT NULL AUTO_INCREMENT,
-  `entity` int(11) NOT NULL DEFAULT 1,
-  `trigger_type` varchar(32) NOT NULL COMMENT 'invoice_validate, supplier_invoice_validate, etc.',
-  `object_id` int(11) NOT NULL COMMENT 'ID of the triggered object',
-  `object_type` varchar(32) NOT NULL COMMENT 'invoice, supplier_invoice, etc.',
-  `action_taken` varchar(64) DEFAULT NULL,
-  `vat_processed` decimal(15,2) DEFAULT 0.00,
-  `status` varchar(16) DEFAULT 'success' COMMENT 'success, error, warning',
-  `error_message` text DEFAULT NULL,
-  `processed_date` datetime DEFAULT NULL,
-  `created_date` datetime DEFAULT NULL,
-  PRIMARY KEY (`rowid`),
-  KEY `idx_trigger_type` (`trigger_type`),
-  KEY `idx_object_id` (`object_id`),
-  KEY `idx_object_type` (`object_type`),
-  KEY `idx_status` (`status`),
-  KEY `idx_processed_date` (`processed_date`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
-
--- =====================================================
--- 6. AUDIT AND COMPLIANCE
--- =====================================================
-
--- Audit trail for all changes
-CREATE TABLE IF NOT EXISTS `llx_declarationtva_audit_trail` (
-  `rowid` int(11) NOT NULL AUTO_INCREMENT,
-  `entity` int(11) NOT NULL DEFAULT 1,
-  `table_name` varchar(64) NOT NULL,
-  `record_id` int(11) NOT NULL,
-  `action` varchar(16) NOT NULL COMMENT 'INSERT, UPDATE, DELETE',
-  `old_values` longtext DEFAULT NULL COMMENT 'JSON of old values',
-  `new_values` longtext DEFAULT NULL COMMENT 'JSON of new values',
-  `user_id` int(11) DEFAULT NULL,
-  `ip_address` varchar(45) DEFAULT NULL,
-  `user_agent` varchar(255) DEFAULT NULL,
-  `created_date` datetime DEFAULT NULL,
-  PRIMARY KEY (`rowid`),
-  KEY `idx_table_record` (`table_name`, `record_id`),
-  KEY `idx_action` (`action`),
-  KEY `idx_user_id` (`user_id`),
-  KEY `idx_created_date` (`created_date`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
-
--- Compliance validation results
-CREATE TABLE IF NOT EXISTS `llx_declarationtva_compliance` (
-  `rowid` int(11) NOT NULL AUTO_INCREMENT,
-  `entity` int(11) NOT NULL DEFAULT 1,
-  `declaration_id` int(11) NOT NULL,
-  `validation_type` varchar(32) NOT NULL COMMENT 'vat_calculation, period_validation, etc.',
-  `validation_status` varchar(16) DEFAULT 'pending' COMMENT 'pending, passed, failed',
-  `validation_message` text DEFAULT NULL,
-  `validation_details` longtext DEFAULT NULL COMMENT 'JSON with validation details',
-  `validated_date` datetime DEFAULT NULL,
-  `validated_by` int(11) DEFAULT NULL,
-  `created_date` datetime DEFAULT NULL,
-  PRIMARY KEY (`rowid`),
-  KEY `idx_declaration_id` (`declaration_id`),
-  KEY `idx_validation_type` (`validation_type`),
-  KEY `idx_validation_status` (`validation_status`),
-  CONSTRAINT `fk_compliance_declaration` FOREIGN KEY (`declaration_id`) REFERENCES `llx_declarationtva_declarations` (`rowid`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
-
--- =====================================================
--- 7. INTEGRATION AND EXPORT
--- =====================================================
-
--- Export history and tracking
-CREATE TABLE IF NOT EXISTS `llx_declarationtva_exports` (
-  `rowid` int(11) NOT NULL AUTO_INCREMENT,
-  `entity` int(11) NOT NULL DEFAULT 1,
-  `declaration_id` int(11) NOT NULL,
-  `export_type` varchar(16) NOT NULL COMMENT 'pdf, xml, csv, excel',
-  `export_format` varchar(32) DEFAULT NULL,
-  `file_path` varchar(255) DEFAULT NULL,
-  `file_size` int(11) DEFAULT NULL,
-  `export_status` varchar(16) DEFAULT 'success' COMMENT 'success, error, pending',
-  `error_message` text DEFAULT NULL,
-  `exported_date` datetime DEFAULT NULL,
-  `exported_by` int(11) DEFAULT NULL,
-  `created_date` datetime DEFAULT NULL,
-  PRIMARY KEY (`rowid`),
-  KEY `idx_declaration_id` (`declaration_id`),
-  KEY `idx_export_type` (`export_type`),
-  KEY `idx_export_status` (`export_status`),
-  KEY `idx_exported_date` (`exported_date`),
-  CONSTRAINT `fk_export_declaration` FOREIGN KEY (`declaration_id`) REFERENCES `llx_declarationtva_declarations` (`rowid`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
-
--- =====================================================
--- 8. INITIAL DATA AND CONFIGURATION
+-- 2. INITIAL DATA FOR MVP
 -- =====================================================
 
 -- Insert default configuration
-INSERT INTO `llx_declarationtva_config` (`entity`, `config_key`, `config_value`, `config_type`, `config_desc`, `created_date`) VALUES
-(1, 'module_version', '1.0.0', 'string', 'Module version', NOW()),
-(1, 'default_period_type', 'quarterly', 'string', 'Default declaration period type', NOW()),
-(1, 'auto_calculation', '1', 'boolean', 'Enable automatic VAT calculations', NOW()),
-(1, 'eu_autoliquidation', '1', 'boolean', 'Enable EU autoliquidation automation', NOW()),
-(1, 'oss_threshold', '10000.00', 'decimal', 'OSS threshold for B2C sales', NOW()),
-(1, 'vat_rates', '20.00,10.00,5.50,2.10,0.00', 'string', 'Supported VAT rates', NOW()),
-(1, 'declaration_language', 'fr', 'string', 'Default declaration language', NOW()),
-(1, 'pdf_template', 'ca3_standard', 'string', 'PDF template for declarations', NOW()),
-(1, 'xml_export', '1', 'boolean', 'Enable XML export for tax authorities', NOW()),
-(1, 'email_notifications', '1', 'boolean', 'Enable email notifications', NOW());
+INSERT INTO `llx_declarationtva_config` (`entity`, `config_key`, `config_value`, `created_date`) VALUES
+(1, 'module_version', '1.0.0-mvp', NOW()),
+(1, 'default_period_type', 'quarterly', NOW()),
+(1, 'vat_rates', '20.00,10.00,5.50,2.10,0.00', NOW()),
+(1, 'declaration_language', 'fr', NOW());
+
+-- Insert default CA-3 line mappings (simplified)
+INSERT INTO `llx_declarationtva_account_mappings` (`entity`, `ca3_line`, `account_code`, `account_label`, `vat_rate`, `created_date`) VALUES
+(1, 'A1', '701000', 'Ventes HT 20%', 20.00, NOW()),
+(1, 'A2', '701000', 'Opérations spéciales', 20.00, NOW()),
+(1, 'B1', '445710', 'TVA collectée 20%', 20.00, NOW()),
+(1, 'B2', '445720', 'TVA collectée 10%', 10.00, NOW()),
+(1, 'B3', '445730', 'TVA collectée 5.5%', 5.50, NOW()),
+(1, 'B4', '445740', 'TVA collectée 2.1%', 2.10, NOW()),
+(1, '17', '445200', 'TVA due intra-EU', 20.00, NOW()),
+(1, '20', '445620', 'TVA déductible immobilisations', 20.00, NOW()),
+(1, '21', '445660', 'TVA déductible autres', 20.00, NOW()),
+(1, '22', '445670', 'Crédit TVA', 0.00, NOW()),
+(1, '28', '445510', 'TVA nette à payer', 0.00, NOW()),
+(1, '29', '445670', 'Crédit TVA à reporter', 0.00, NOW());
 
 -- =====================================================
--- 9. INDEXES FOR PERFORMANCE
+-- 3. BASIC INDEXES FOR PERFORMANCE
 -- =====================================================
 
--- Additional indexes for performance optimization
 CREATE INDEX `idx_declarationtva_periods_dates` ON `llx_declarationtva_periods` (`start_date`, `end_date`);
-CREATE INDEX `idx_declarationtva_declarations_period_status` ON `llx_declarationtva_declarations` (`period_id`, `status`);
-CREATE INDEX `idx_declarationtva_account_mappings_line_active` ON `llx_declarationtva_account_mappings` (`ca3_line`, `is_active`);
-CREATE INDEX `idx_declarationtva_eu_transactions_period_type` ON `llx_declarationtva_eu_transactions` (`period_id`, `transaction_type`);
-CREATE INDEX `idx_declarationtva_workflow_log_trigger_date` ON `llx_declarationtva_workflow_log` (`trigger_type`, `processed_date`);
-CREATE INDEX `idx_declarationtva_audit_trail_table_date` ON `llx_declarationtva_audit_trail` (`table_name`, `created_date`);
+CREATE INDEX `idx_declarationtva_declarations_period` ON `llx_declarationtva_declarations` (`period_id`);
+CREATE INDEX `idx_declarationtva_account_mappings_line` ON `llx_declarationtva_account_mappings` (`ca3_line`);
 
 -- =====================================================
--- 10. VIEWS FOR REPORTING
--- =====================================================
-
--- View for declaration summary
-CREATE VIEW `v_declarationtva_summary` AS
-SELECT 
-    d.rowid,
-    d.entity,
-    d.declaration_number,
-    d.status,
-    p.period_name,
-    p.period_type,
-    p.start_date,
-    p.end_date,
-    d.total_vat_collected,
-    d.total_vat_deductible,
-    d.net_vat_due,
-    d.vat_credit,
-    d.submission_date,
-    d.approval_date,
-    d.created_date,
-    d.modified_date
-FROM `llx_declarationtva_declarations` d
-LEFT JOIN `llx_declarationtva_periods` p ON d.period_id = p.rowid;
-
--- View for account mapping summary
-CREATE VIEW `v_declarationtva_account_mappings` AS
-SELECT 
-    am.rowid,
-    am.entity,
-    am.ca3_line,
-    am.account_code,
-    am.account_label,
-    am.vat_rate,
-    am.account_type,
-    am.is_active,
-    am.weight,
-    am.sort_order,
-    aa.label as account_full_label,
-    aa.account_number as account_number
-FROM `llx_declarationtva_account_mappings` am
-LEFT JOIN `llx_accounting_account` aa ON am.account_code = aa.account_number;
-
--- =====================================================
--- END OF SCHEMA
+-- END OF MVP SCHEMA
 -- =====================================================
\ No newline at end of file