Only you have access to your returns ... if you don't have access then you will need to get it from him which may be a legal issue or get a transcript of the prior year returns from the IRS ...
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
