What if I make a mistake filing my tax return on TNTAP? A taxpayer can amend any return filed electronically online. March 31, 2017 18:50 Related articles How do I reach the Tennessee Department of Revenue? I’m trying to register for TNTAP and I get the error “The ID, ID Type, or Name you have entered does not match our records.” What should I do? TNTAP: Navigating in a Period If the due date for filing a return falls on a weekend or holiday, when is the return due? Who has the right to apportion?