If you have to file injured spouse form, and you had to amend your return to include more income do you have to file injured spouse for both returns?

No, you'll just file your Form 8379 with your amended return, based on the numbers on the amended return.

Please see Instructions for Form 8379 and the TurboTax FAQ "How do I file Form 8379, Injured Spouse Allocation?" below for additional information.

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