I can't put in my interest paid on my home in 2021

To enter your Form 1098 your 1098 (Mortgage Interest Statement), see below

1. With your return open, search for 1098 and select the Jump to link in the search results
2. Follow the instructions to enter your 1098 info

If you're using the mobile app, use these instructions.    Your 1098 (Mortgage Interest Statement) shows how much mortgage interest, points, and (oftentimes) real estate/property tax you paid in the previous year.    The IRS lets you deduct your mortgage interest, but only if you itemize deductions.     You can't deduct the principal (the borrowed money you're paying back).  

In addition to itemizing, there are a few other requirements and the amount you can deduct may be limited in certain situations.   For more details, see Deducting Home Mortgage Interest.