On the Indiana State Tax return there is a place to claim the excise tax. How do go back so I can enter it?
You claim it on the federal portion of the interview. TurboTax will transfer these deductions to your Indiana return. Go to the Federal menu on the left, and find the Cars and Other Things You Own section under 'Deductions and Credits', see attached. You can enter any excise taxes (the portion based on the vehicle's value) paid under Car Registration Fees.