As you prepare your tax documents for filing, please review the following information pertaining to IRS Form 1098 (Mortgage Interest Statement). Use this form when you need to formally communicate with your lender about paying off your debt.It is suitable for various types of loans and mortgages. fields. City of Alameda Down Payment Assistance Loan Application. One form tells borrowers the remaining principal amount and interest they have to pay to close out the loan. Sample filled-in forms with instructions are available at the end of this Guide.