Tex. Tax Code § 111.056 — FILING WITHIN 10 DAYS: PENALTY AND INTEREST

If a report is filed or a tax payment is made before the expiration of 10 days after the date on which the report or payment is due and if the report as originally filed shows the correct amount of the tax due or the amount of the payment is for the correct amount due, no assessment for penalty or interest may be made solely on the grounds of late filing after the expiration of 90 days after the date the report was required to be filed or the payment required to be made. Acts 1981, 67th Leg., p. 1505, ch. 389, Sec. 1, eff. Jan. 1, 1982.