Thanks. Turns out that link is for Windows only, is there a mac version?
I just realize that Federal taxes can only be amended going back 3 years (i.e. 2016 this year). But, I got audited for CA where I made a mistake and now have to pay higher taxes to CA, and therefore, want to claim the increased taxes I pay as an exemption on my federal return. If I can't amend, how can I claim this extra exemption? Doesn't seem right that CA can collect extra taxes but I can't now claim them on my federal.
