Any idea of how far back you can go?
My fault really for putting all my faith in an accountant. I always had this feeling that I was paying too much.
Anyway she’s not with us anymore, and I’m seeing a new one Wednesday. Of course I could wait, but I can’t.
The big one is not accounting for any of the interest on a business loan I got in 2004.
It also appears that no purchases in cash have ever been accounted for, and more recently Paypal.

7 years?

5 years after filing date which means in practice 6 years generally – see here