Add federal tax parameters for 2024 and 2025 #511
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Fixes PolicyEngine#505 - Updated federal tax brackets for 2024 - Updated basic personal amount to ,705 - Updated phase-out thresholds to match new bracket boundaries
Fixes PolicyEngine#505 and PolicyEngine#506 2024 Updates: - Updated federal tax brackets for 2024 - Basic personal amount increased to ,705 - Phase-out thresholds aligned with new bracket boundaries 2025 Updates: - Updated federal tax brackets for 2025 with 2.7% indexation - Lowest tax rate reduced from 15% to 14.5% (effective July 1, 2025) - Basic personal amount increased to ,129 - Added 2026 rate of 14% for full-year implementation
- Added CRA and Department of Finance references for tax rates - Added references for Basic Personal Amount values - Sources include official government pages and verified tax resources
- Replace secondary sources with official T4127 Payroll Deductions Formulas - Add note where primary sources for exact values couldn't be found - Keep Department of Finance reference for 2025 rate reduction announcement
Found official CRA sources in T4127 Payroll Deductions Formulas: - 2023: base ,521, max ,000 (117th Edition) - 2024: base ,156, max ,705 (119th Edition) - 2025: base ,538, max ,129 (120th Edition) All values now have primary government source references.
- Added T4127 references for all years 2021-2025 - Each year now has its specific T4127 edition reference - Added notes where 2020 values come from general CRA page - All parameter values now have primary source documentation
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Summary
Changes
2024 Updates
2025 Updates
Fixes #505 and #506
Test plan