Official CA-3 Form Lines:
- Section A: Opérations imposables (A1, A2, B1-B4)
- A1: Base HT of taxable operations
- A2: Special operations (asset sales, self-deliveries)
- B1-B4: Rate breakdowns (20%, 10%, 5.5%, 2.1%) with base + tax
- Section B: TVA due (Line 17)
- Intra-EU acquisitions autoliquidation
- Section C: TVA déductible (Lines 20, 21)
- Line 20: Capital goods VAT
- Line 21: Operating expenses VAT
- Section D: Résultat (Lines 22, 28, 29)
- Line 22: VAT credit to carry forward
- Line 28: Net VAT to pay
- Line 29: VAT credit amount
Enhanced Features:
- Detailed account breakdown for draft declarations
- Drill-down from form lines to individual transactions
- Separate handling of base amounts (HT) and VAT amounts
- Support for all French VAT rates
- Special operations handling (A2 line)
- Export detailed breakdown reports
Updated task estimates: +37 hours for form structure implementation
Added comprehensive bilingual support for all CA-3 form lines
Core Advanced Features:
- Draft system with detailed account breakdowns
- Validation workflow with approval process
- Automatic journal entry generation (445510/445670)
- Complete audit trail and version history
- Multi-entity support for multiple companies
Analytics & Reporting:
- Period comparison tools with variance analysis
- Interactive dashboard with KPIs and trends
- Exception handling for unusual amounts
- Automated alerts and notifications
User Experience:
- Mobile-responsive design
- Document management with attachments
- Email notifications for deadlines
- Keyboard shortcuts and accessibility
Integration & APIs:
- External tax system integration
- Backup/restore functionality
- Webhook support for real-time updates
- API documentation for third-party access
Updated time estimates: 350+ hours total
Added Phase 7 (Advanced Features) with 80+ hours
Enhanced bilingual support for all new features
- Create PLANNING.md with detailed project architecture and phases
- Create TASK.md with 200+ hour development plan broken into 6 phases
- Add French language support (fr_FR/declarationtva.lang)
- Update English translations with CA3-specific terminology
- Define CA3 box structure and PCG account mappings
- Plan bilingual interface for French-speaking users
- Include database schema, testing, and documentation phases
- Add core module structure
- Include admin interface
- Add language support (en_US)
- Include SQL schema
- Add build configuration
- Include documentation and licensing
