Summary

• Adds Mississippi's Tier 2 homestead exemption for age-65-or-disabled homeowners.
• Models eligibility, exempt assessed value, and estimated property-tax reduction for the first $7,500 of assessed value.
• Adds focused eligibility, exemption, and reduction tests.

Closes #8198.

Value Review

• Mississippi Department of Revenue says the additional age-65-or-disabled exemption applies to the first $7,500 of assessed value.
• HB 1255 in the 2025 Mississippi legislative session proposed increasing this amount to $12,500, but the bill died in committee, so the current modeled value remains $7,500.

Source:

• Mississippi Department of Revenue, Homestead Exemption: https://www.dor.ms.gov/county-services/homestead-exemption

Tests

• /Users/daphnehansell/Documents/GitHub/policyengine-us/.venv/bin/python policyengine_us/tests/test_batched.py policyengine_us/tests/policy/baseline/gov/states/ms/tax/property/age_disability_homestead_exemption --batches 1
• /Users/daphnehansell/Documents/GitHub/policyengine-us/.venv/bin/ruff check policyengine_us/variables/gov/states/ms/tax/property/age_disability_homestead_exemption
• /Users/daphnehansell/Documents/GitHub/policyengine-us/.venv/bin/python -m pytest policyengine_us/tests/test_parameter_files.py policyengine_us/tests/test_system_import.py