[will_brown]

As I mention to a number of other comments...it simply depends on the accounting method.

It can be waived (not treated as income at all as you say) or it can be treated as income (taxes paid) and the loss carried forward for future deduction.

[Stratoscope]

Yes, I was assuming cash accounting. I updated my comment to mention the difference between cash and accrual accounting, thanks for noticing that.