If you only have one mortgage (it's a "mortgage" on the house even if it called a home equity loan or equity line of credit) then you can enter the 1098. However, the interest won't be tax-deductible unless you used the funds for a substantial improvement on your home.
You can only deduct interest on "acquisition debt", that is debt used to buy, build or remodel your home. If your home was paid off, then the new loan is not acquisition debt and the interest is not deductible, unless you used part or all of the loan proceeds to improve your home.