Deductions & credits

However, I would think a mortgage loan is different from a RV loan in that the mortgagee sends the mortgagor a Form 1098 listing the interest paid the prior year. I don't think a RV dealer financing a RV is obligated in the same way. So, how does one go about writing off the interest of an RV loan? Is the 'interest paid' calculated solely by the loanee?