I was working on a couple's return and filed the mothers return for the spouse and accidently used the spouse's social security number on the return, which the IRS accepted.  I re-filed the mother's return with the correct social security number, no refund or tax due was involved.  How can I file the joint return?  I would guess that I would have to paper file the return and show the reason as inadvertently filing her mother's return with spouse's social security number.  Is my thinking correct?