Asking how I filed last year I didn't use a 1040 I used an 8879 and its not one of the options

I received this answer being in the same situation. "Since Form 8879 pulls the AGI value from Form 1040 it should work as long as it was the final version from the original filing. You can find your AGI on Line 1 of Part I." I then found after the fact that the CPA I used provided a thumb drive that included the 1040 form. The AGI value found on the 1040 is the same number on the 8879.