If she used a paid tax preparer they are required to provide copies of tax returns filed.
Go to this IRS website for information on how to file a complaint - https://www.irs.gov/tax-professionals/make-a-complaint-about-a-tax-return-preparer
Go to this IRS website for free federal tax return transcripts - https://www.irs.gov/individuals/get-transcript
For a fee of $43 you can get a complete federal tax return from the IRS by completing Form 4506 - http://www.irs.gov/pub/irs-pdf/f4506.pdf
