Can I input mortgage interest if I know the amount without the form?

[LenaH]

Yes. 

To enter your mortgage interest, please follow the instructions below:

1. Open your return.
2. Search for 1098 with the magnifying glass tool at the top of the page.
3. Click the Jump to 1098 link at the top of the search results.
4. Answer yes to Did you pay any home loans in 2020?
5. Continue on the page that says Get ready to be impressed.
6. Rather than entering a bank name or sign-in URL, scroll down and click on Change how I enter my form.
7. Click on Type it in myself on the bottom right.
8. Follow the on-screen instructions.