When I go to Extensions and Other Tax Payments - Federal Income Tax Withheld it is grayed out and unable to change. Then I was told to "enter your W-2G forms under the standard gambling section, but zero out the income portion so it doesn't duplicate your Schedule C gross receipts" but doing this gives me an error that the tax withheld cannot exceed the reportable winnings. To bypass this I was then navigated to file Form 1099-MISC for each withholding and enter $0 in income and the full amount in withholding. Doing this I ran into the same issue as the previous step.