Get your taxes done using TurboTax

My apologies, but I don't have a 1098 for my RV loan interest and I am using the Web version of Turbo Tax.  It doesn't give me a field as the Desktop application has done in the past to enter it.  Do I just enter it as if it was a 1098 form - That doesn't seem like the correct way.  Please advise to how to enter RV interest without a 1098 in the Turbo Tax Web version.