Didn't file 2023 as I was fully disabled no income (SSDI). Filed last year just now (2024) an I'm concerned without real help I did something wrong.

[Mike9241]

if you had no income in 2023 you were not required to file a federal return. if you have a state income tax, most likely, the same rule applies. 

[xmasbaby0]

If your only income was Social Security disability, you were not required to file an income tax return unless you have a 1095A for having marketplace health insurance.  

Who has to file?

http://www.irs.gov/uac/Do-I-Need-to-File-a-Tax-Return%3F

[xmasbaby0]

When you say you "filed last year just now" (2024)----what do you mean?    The current online software is only for 2024 returns.   It cannot be used for a 2023 return.   If you used online TurboTax for a 2023 return, the return is wrong, and will likely be rejected if you e-filed.   Again, if your only 2023 income was Social Security, you have no requirement to file a 2023 tax return unless you had health insurance from healthcare.gov---aka "marketplace" insurance, aka "Obamacare" insurance. 

If you did not have marketplace insurance, and the e-file is rejected, just stop there, and do not do anything else with the return, since you do not need to file.