1) ask her nicely or use an attorney to ask not so nicely
2) You can get a return transcript from the IRS for free : http://www.irs.gov/Individuals/Get-Transcript
3) For a $50 fee you can get a copy of the return from the IRS: https://ttlc.intuit.com/questions/1901218-can-i-get-a-copy-of-my-tax-return-from-the-irs
