Failed Transmission Error 703 - Duplicate SSN

[CJR]

Does anyone have insight on how to resolve failed transmission due to Error 703?  After speaking with Lacerte customer support, I don't have a better understanding what the difference is between this error message and the fed reject "R0000-902-01: Taxpayer TIN must not be the same as a previously accepted return" besides that the failed transmission has not been sent to the IRS.  Are these returns stuck in limbo? Is there a way to verify if these taxpayers have been victims of identity fraud?

[Just-Lisa-Now-]

Someone else already filed a return with that SSN, or the client was a dummy and didnt read the instructions and used the Non Filer app to get the EIP.

[George4Tacks]

I believe the difference is that Intuit is catching a duplicate that has been filed through Intuit. I don't know if it means another has been filed through Lacerte, or just any of the Intuit Family. 

The only out is to paper file, which is a form of purgatory in today's IRS mail processing. If ID theft is involved, IRS will inform the client. https://www.irs.gov/identity-theft-fraud-scams/identity-verification

Especially if this is a client new to you, verify your data entry and ask to see the Social Security card. Let the client know what is happening.

[BobKamman]

@George4Tacks  "The only out is to paper file, which is a form of purgatory in today's IRS mail processing."

Why do you say that?  If the taxpayer is expecting a refund, he should have filed months ago.  Probably would have avoided this problem, too.  If it's a balance-due return, does anyone know if the private lockboxes are cashing checks?  And maybe he owes but can't pay right now.  Better to get the bill in November, than August.