Form 8453 is a cover sheet it has no reported information.
IRS requires details of all sell transactions , one way or another.
EXCEPTION: for covered transactions category Box A or D without adjustments, Form 8949 is not required. No mailing is necessary.
4) that is just exactly what you have on your e-Filed return now if you summarized all categories.
====
Suggestion: don't mail anything.
Don't discard your PDFs in case IRS sends you a notice later asking for the details.
