I sold stock at a loss do I have to report it?

[deb204]

I received a 1099-B form showing a loss do I pay extra in filing fees to show I lost money?

[AamilD]

Yes, this is because IRS tries to match all the documents which you entered against the documents they received for you. Your brokerage would have send the IRS a copy of your 1099B and when they see that you have not entered it, a mismatch can occur causing delays.