When you filed a non filer RETURN you DID file a tax return on the form 1040 even if you didn't save a PDF of the return or realized what you did... this was the only way to efile one and get it thru the IRS system which is why the 1040 you are trying to file now gets rejected. Only ONE return can be efile per year so now you must file an amended return ... however for this situation you do not use the 1040X. Instead the IRS put out instructions to use the 1040 form with a note on the front page. It must be printed, ink signed and mailed in as directed. And expect this to take 4 to 6 months (possibly more) to process due to the backlog the IRS has at all processing centers.
If you used the IRS non-filer site to get a stimulus check, you will now get a “duplicate SSN” rejection. We are seeing people who did not notice or ignored the warning on that site about using it if they would be filing a tax return.
https://ttlc.intuit.com/community/tax-topics/help/stimulus-how-to-file-your-return-after-getting-rej...
You can check the status of your amended return here but allow 3 weeks ***after filing for it to show up:
https://www.irs.gov/filing/wheres-my-amended-return
***Due to the earlier covid shutdown the IRS is playing catch up on the 11 million + envelopes that piled up at the same time new mail is arriving ... processing times for anything mailed in this year is 4 to 6 months and all you can do is wait and check the IRS site once a week until you see it in the system.
