Tax return for 2019 - don't have US address

So I left the U.S. in 2019, however I lived there a couple months after graduation.
So I need to file tax return for 2019 as a former F-1 visa holder.
Forms 8840 and 8843 since I claim closer connection exception, and had no income in 2019.

What do I put for US address line in either forms? Do I put non-us address there? Is it permissible? It specifically asks for US address.

Has anyone filled taxes for 2019?