George-Just use the "This is a seller financed loan and I did not receive a 1098" option. TurboTax Deluxe 2017 will then enter the interest correctly on Schedule A and the 1040. TurboTax's option for entering RV interest into TurboTax Deluxe 2017 has very misleading wording. I read that option as two different requirements: the "loan is seller financed" and also "I do not have a 1098".
In my case and most other people's, the seller is the RV dealership and the financing is totally independent of the seller. The financing is done by a financial institution, a bank, that does not issue 1098's. In TuboTax Deluxe 2015 they had the single "I did not receive a 1098" option that fit the situation, however in the 2016 and 2017 versions they added the incorrect portion of the option, "This is a seller financed loan". Hope this makes sense as the answer to my question to TurboTax did not address my question.
