Sales and use tax due dates vary depending on a taxpayer's filing frequency. Monthly filers must file by the 20th day of the month following the end of the reporting period. Quarterly filers must file by the 20th day of the month following the end of the quarter. Annual filers must file by January 20th yearly. Please note that if a due date falls on a weekend or holiday, the date is extended through the next business day.
Reference: Tenn. Code Ann. §§ 67-6-504 and 505.