The effective date of Public Chapter 514, which amended the law to require triple weighting, is for tax years beginning on or after July 1, 2016. All receipts on the 2016 return of a calendar year taxpayer should be double weighted since the taxpayer’s tax year begins before the July 1, 2016, effective date of the law change. All receipts on the 2017 return should be triple weighted.
Reference: Tenn. Code Ann. §§ 67-4-2012(a)(2); 67-4-2111(a)(2).