Well you could get a copy from him or the userID & password to access the return.
You can get a return transcript from the IRS for free : http://www.irs.gov/Individuals/Get-Transcript
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
