I scanned and uploaded signed form 8332.  There is a selection for form uploaded for Form 8332.  In diagnostics says "attached to non-existent form".

When not selected as Form 8332, produces a form 8453 to mail in.

Seems if Form 8332 is attached to e-file, mailing with form 8453 should not be required.

Question:

How do I attach pdf of executed form 8332 to e-file of form 1040 so Form 8453 is not required, and do not get error message?