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Fix DC standard deduction for 2025 OBBBA non-conformity#7930

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PavelMakarchuk wants to merge 4 commits intomainfrom
dc-standard-deduction-fix
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Fix DC standard deduction for 2025 OBBBA non-conformity#7930
PavelMakarchuk wants to merge 4 commits intomainfrom
dc-standard-deduction-fix

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Summary

DC established its own basic standard deduction amounts for 2025, which do not include the OBBBA increases present in federal amounts. PE was using the federal values, overstating the DC standard deduction by $750-$1,500.

Closes #7928

DC 2025 Standard Deduction (from D-40 Booklet p.13)

Filing Status DC 2025 Federal 2025 (OBBBA) Difference
Single $15,000 $15,750 -$750
MFJ $30,000 $31,500 -$1,500
HoH $22,500 $23,625 -$1,125
MFS $15,000 $15,750 -$750
Additional (elderly/blind) $1,600/$2,000 $1,600/$2,000 Same

Changes

  • New parameter: gov/states/dc/tax/income/deductions/standard/amount.yaml with DC-specific basic amounts for 2025
  • Updated dc_standard_deduction variable: formula (pre-2025) uses federal; formula_2025 uses DC-specific basic + federal additional
  • 6 tests: single, joint, HoH, separate, joint elderly couple ($33,200), and 2024 conformity check

Test plan

  • 6 unit tests covering all filing statuses and elderly additional
  • 2024 test confirms pre-2025 federal conformity
  • CI passes

References

🤖 Generated with Claude Code

DC established its own basic standard deduction for 2025 per the
D-40 booklet ($15K single, $30K MFJ, $22.5K HoH), which does not
include the OBBBA increase present in the federal amounts ($15.75K,
$31.5K, $23.625K).

Adds DC-specific basic standard deduction parameter for 2025+.
Before 2025, DC continues to conform to federal amounts.
Additional standard deduction (elderly/blind) still matches federal.

Closes #7928

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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codecov bot commented Apr 6, 2026

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (d95d3cd) to head (9033ec3).
⚠️ Report is 141 commits behind head on main.

Additional details and impacted files
@@            Coverage Diff             @@
##              main     #7930    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files           19         1    -18     
  Lines          297        17   -280     
==========================================
- Hits           297        17   -280     
Flag Coverage Δ
unittests 100.00% <100.00%> (ø)

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PavelMakarchuk and others added 3 commits April 6, 2026 12:55
- Add DC Code § 47-1801.04(3A) reference (defines amounts)
- Add DC Act 26-214 reference (OBBBA non-conformity act)
- Keep D-40 booklet reference (tax form confirmation)
- Add uprating: gov.irs.uprating with $50 downward rounding
  per DC Code § 47-1801.04(11) (Washington-Baltimore CPI-U,
  using national CPI as proxy)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- 2023 single: confirms federal conformity ($13,850)
- 2024 single/joint/HoH: confirms federal conformity before DC divergence
- 2025 all 5 filing statuses: confirms DC-specific amounts
- 2025 elderly couple: $30K + 2x$1,600 = $33,200
- 2025 elderly single: $15K + $2,000 = $17,000

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Verifies that 2026 values are uprated from the DC base amounts
($15K/$22.5K/$30K), NOT from the higher federal amounts ($15.75K/
$23.625K/$31.5K). Uses margin of $100 to accommodate CPI variation.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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DC standard deduction does not reflect OBBBA non-conformity for 2025

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