There are several types of 1098 forms.
If you have a 1098 reporting Mortgage Interest, type '1098' in the Search area, then click on 'Jump to 1098'.
If you have a 1098-T for Education Expenses, go to the Education section under Deductions & Credits.
If you have a 1098 for Student Loan Interest, click this link for instructions on How to Enter Student Loan Interest.