I started my return on TurboTax online. It got too complicated for me so I went to a family member who could help. He uses TurboTax desktop. When he is attempting to file, he is getting an error message stating, "The submission is a duplicate of one that was previously received." I have gone back online, and it has not been transmitted.
I suggest that you contact the IRS and report suspected fraud.
"If you did not receive a notice but believe you've been the victim of identity theft, contact the IRS Identity Protection Specialized Unit at 800-908-4490, extension 245 right away so we can take steps to secure your tax account and match your SSN or ITIN."
You can ask them advice about filling your current return.
If you need more time, you can file for an extension with TurboTax.
See TurboTax Desktop in How do I file an IRS tax extension?
This will give you until 15 October 2025 to file your taxes.
If you owe taxes, you must pay by April 15th.
To file for extension in the TurboTax program
Thank you - would it be any reason due to the fact that I have started the process using the Online Version and it still has information in there?