From your tax data source (e.g. avalara, taxcloud, state DOR). Name them like 'taxrates_zip5_MN202606.xlsx' — the state and period are auto-detected.

Drag-drop or pick up to 50 files at once. Each file fully replaces the prior data for its state, so reuploading a newer period is non-destructive across states.

ZIP and a combined / total rate are required. State, county, city, special breakdowns + county/city names are picked up automatically when present.

Inputs page reads the project's state + ship-to ZIP and fills the tax rate automatically. You can still override per project for special cases.