Tenn. Code Ann. § 5-12-207

The county mayor shall furnish to the director of schools and to the chief administrative officer of the county highway department an estimate of the amount of revenue to be generated by one cent (1¢) of the county property tax for each taxing jurisdiction for the ensuing fiscal year and a form tax rate resolution on or before March 15 of each year. The assessor of property shall furnish such assessor's best estimate of the actual assessed value of all taxable property within the county for the ensuing year to the county mayor before March 15 of each year.