My ex wife and I were legally separated all of 2014. She used my kids as leverage and filed 2014 taxes stating we were married. She didn't work the entire year and wouldn't get a return if she didn't use me. She lived in an entirely different state. She filed our taxes, signed my name, didn't tell me until after it was done and threatened to keep my kids from me if I changed anything.
I have wanted to file an amended return since it happened, but I needed to clear all of our legal hurdles first to ensure she can't use the kids again.
What can I do? What are the repercussions of amending and what is the best way to go about doing it?