Can I write off this loss revenue?
What lost revenue? I'm not clear. I get the impression that assumptions are being made that may or may not be correct. What kind of tax reporting document did Groupon send you? A 1099-K1? A 1099-MISC? Something else? On whatever form they sent, in what box is the income reported? Is the amount reported "only" the amount that you actually received from Groupon?
