Have a Tax Question? Ask a Tax Expert
You could contact your state department of revenue and request a copy of your 2005 return. Many states require that a copy of the federal return is attached to the state.
If you received a refund in 2006 for 2005, you can review your bank statements for deposits that might be the refund, and request a copy of the check to send to the IRS for proof.
You could try "googling" the preparer's name, or contact others that may have used the preparer's services.