After you file

Sorry, yes, I meant to say "amendment", not extension.

I'm expecting a refund, but only after I amend the return. The original return I sent said that I owed $4000, so that's what I sent a check for.

Do I have to wait for the IRS to get my 4k back? Will their system cross check what I entered and the w2 from the employer and then recalc my return and not cash my check?

When can I find the amendment, do I need to wait for an answer from the IRS about this/the original return first?

Thank you!