Most states that reward on-time sales tax filing take one percentage, maybe with a cap. Georgia does not. Its ST-3 instructions give 3% of the first $3,000 of tax on a return and 0.5% of the portion above that, and only when the return and the payment are both on time.
ai-bookkeeper's salestax return now carries that as a tiered discount, preset under --state GA as the "GA state" label. A $2,000 return earns $60; a $5,000 return earns $90 plus $10. The late-payment warning that already covers Texas, Florida and Illinois covers it too.
Caveats, as in the code: the rule was read through search excerpts because dor.georgia.gov did not resolve from the session, and a 2026 fiscal note describes a proposal to lift the $3,000 step to $10,000 that I could not confirm as law. Check your own ST-3 instructions.