When you open your return, look at the top for a link to 'Check Efile Status' and click on it. That will give you more info about your Rejection Error Code. You may also have an Email from TurboTax about the rejection.
Once you verify what the error is, and your AGI is the issue, when going through the FILE section you'll be able to enter the correct AGI from your 2023 return and continue on to Efile again.
If you're not sure this is the error, if you share your Error Message, we'll try to help.
Here's more info on Reject for Incorrect AGI.
@ebyson73
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