Problem

The qualified_reit_and_ptp_income variable exists in PolicyEngine US but is not connected to the QBID calculation. Per IRS Form 8995 (Lines 6-9) and §199A(b)(1)(B), qualified REIT dividends and qualified publicly traded partnership (PTP) income
should receive a separate 20% deduction that is added to the QBI component.

Current Behavior

• qualified_reit_and_ptp_income is defined in /policyengine_us/variables/household/income/person/dividends/qualified_reit_and_ptp_income.py
• The variable documentation even states: "Part of the QBID calculation"
• However, qbid_amount.py does not reference this variable
• Taxpayers with REIT dividends or PTP income receive $0 deduction on that portion

Expected Behavior

Per Form 8995:

• Line 6: Enter qualified REIT dividends and qualified PTP income
• Line 9: REIT/PTP component = 20% × Line 6 (if positive)
• Line 10: Total QBID = QBI component (Line 5) + REIT/PTP component (Line 9)

Important: The REIT/PTP component is NOT subject to:

• W-2 wage limitations
• UBIA (property basis) limitations
• SSTB phase-out rules

It's a simpler calculation than the QBI component.

Impact

• High - Affects all taxpayers who hold REIT mutual funds, REIT ETFs, or publicly traded partnership investments
• Common in retirement accounts and dividend-focused portfolios

Implementation

1. Add new parameter gov/irs/deductions/qbi/max/reit_ptp_rate.yaml (20% rate, separate from QBI rate)
2. Modify qbid_amount.py to add:
   reit_ptp_income = person("qualified_reit_and_ptp_income", period)
   reit_ptp_component = p.max.reit_ptp_rate * max_(0, reit_ptp_income)
   return qbi_component + reit_ptp_component
3. Add tests for REIT/PTP scenarios

References

• https://www.law.cornell.edu/uscode/text/26/199A#b_1_B - Combined qualified business income amount
• https://www.irs.gov/pub/irs-pdf/f8995.pdf - Lines 6-9
• https://www.irs.gov/pub/irs-pdf/i8995.pdf