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@aarora wrote:

Amend return>Misc Forms>Amended Return (1040X)/Superseded return> Check Box Superseded return (Amended return is not checked)

The critical diagnostic error mentions that 1040X must be included in the superseded return. Is this correct behavior?

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I don't know about ProConnect, but that is how Intuit forces ProSeries to work.  However, I suspect it is wrong and that Intuit hasn't updated the software in that regard to file a Superseded return.