2021 Tennessee Code
Part 4 - Miscellaneous
§ 4-1-402. Due Dates Falling on Saturday or Sunday

Whenever the due date for filing any schedule, form or return with any state department or agency or for paying any tax due the state occurs on a Saturday or Sunday, the taxpayer shall have until the close of business hours for such department or agency on the following Monday to file such schedule, form or return or to pay such tax.