Is interest on an RV loan deductible? Where do you record excess sales tax expense?

Yes, your interest on your RV loan can be deductible. 

 A mobile home, like the RV, that has sleeping, cooking, and toilet facilities counts as a main or second home, and as long as it meets all the other requirements for deducting mortgage interest, you can claim the interest like an immovable home.

Please see Can I deduct my mortgage? for details on requirements.

To enter the interest paid for the loan on your Motor home RV please follow these steps:

1. With your return open, search for 1098 and select the Jump to link in the search results.
2. Follow the instructions to enter your info.

To enter your sales taxes please follow these instructions:

1. With your tax return open in TurboTax, search for sales tax and then select the Jump to link in the search results.
2. On the Sales Tax and Income Tax screen, select Continue with Sales Tax.
3. When asked how you want to enter your sales tax, select EasyGuide.
4. Answer the questions on the next few screens. When you get to the Major Purchases screen, answer Yes.
5. Follow the on-screen instructions to enter your info.