Need to Amend, dont have ex-wifes SSN

[aross123]

Weird story, my ex filed 2018 taxes and never told me about it, took the money and ran, havent seen her in many years. I had a 1099 from eBAY and no write offs were done so they are saying I owe $20k. They are letting me amend the 2018 taxes, however, I dont have my ex-wifes SSN, how am I supposed to amend my taxes? She originally filed the return joint, married. Can I amend it married filing separate so I dont have to put her info on there? or put all zeros in for her SSN? Im out of ideas.

[ThomasM125]

It's not likely you will be able to amend the return as a joint return as you would both have to sign it for it to be able to be processed. You can't amend a return to switch from married-joint to married-separate after the original due date of the return. You can contact the IRS and ask them if you can provide them with the schedule C you need to report the expenses associated with the missing income, but they may not be willing to accept that.