Thank you very much for your replies. Now I know I can make a payment electronically without waiting for the 1040X to be processed or even received first. I may write a check and mail it in the same envelope with the return forms. Your brought up a great point about not putting the SSN on the check. I didn't think about that since the 1040X instructions said to put the SSN on the check. I think the IRS processor can match my name with the return since they will be in the same envelope, and I won't put the SSN on the check then. Thank you again.
