Relating to the calculation of certain ad valorem tax rates.

HB 5447 requires local taxing units (like cities and counties) to use electronic forms for calculating property tax rates. The bill mandates that these forms must be fillable, verify calculations against official appraisal rolls or value estimates, integrate with state property tax databases, and include hyperlinks to documents supporting non-mathematical entries. It applies to tax rate calculations for tax years starting January 1, 2026, and affects how local officials determine "no-new-revenue" and voter-approved tax rates. The changes aim to standardize and verify tax calculations through digital processes.