<prompt> Human: I filed first thinking that we would be better off filing separately but it turns out my husband would owe about 4K more if he filed separately instead of jointly. My husband ended up filing jointly without me so now we have my return sent to IRS and accepted and his came back rejected because his IRS pin was incorrect.We are waiting to get an answer on this to fix it.Do I have to file the amended return and my husband leave his return rejected or does he file his return and I amend mine to married filing jointly? He also filed a schedule c since we own a business together 5050 so not sure how that will affect the amended return as well.  <response>: Either of you can amend. Its unlikely that you will benefit from filing MFS. Why do you think thats better? 