just file a simple, free tax return,......that is the only way to get the stimulus payments
https://apps.irs.gov/app/freeFile/
Enter your personal information, enter $1.00 income to e-file and use 0 for your AGI (which will be asked to e-file your return).
You can also try using IRS FreeFile if that seems easier, but do not file twice.
Sign into your account and your return
Type other reportable income into the Search Box and click the “Jump to other reportable income” link
-OR-
Click Federal on the left side-bar
Click Wages & Income along the top
Scroll down to the last section Less Common Income and click Show more to open drop-down
Scroll down to last section Miscellaneous Income and click Start
Scroll down to the last section Other reportable income and click Start
Enter the description as “To file for recovery rebate credit” and the amount as a 1