Due Dates and Tax Rates

Due Dates

Annual 15th day of the fourth month following the close of your books and records.  For businesses with a January 1 - December 31 calendar year, this tax is due on April 15 of the following year.
Quarterly Estimated Payments 15th day of the fourth, sixth, and ninth months of the current tax year and the 15th day of the first month of the next succeeding tax year, if you have a combined tax liability of $5,000 or more in both the prior and current years.
Extension Seven months extension

Tax Rates

Franchise tax 0.25% of the greater net worth or real tangible property in Tennessee. The minimum tax is $100. 
Excise tax 6.5% of Tennessee taxable income