When people report non W2G gambling income ( so from their own source records and no IR) have you ever had an issue with a government agency, be it IRS or your state, questioning the EXCESS unreported you reported?
I would appreciate if we could stick to the question, i know its reportable.
The minimum you have to report on gambling winnings is the total of all W-2G forms you received during the year but you can always report more than that and the IRS is agreeable to your doing so. In 30 years of doing taxes I have not see the IRS audit anyone for being honest in this matter.
Reporting taxable income on tax return without a form received for the income is not an issue.
Millions of taxpayers report on their tax returns each year receiving taxable income where the IRS and/or State will not have any records of that income being received by the taxpayer. This is usually is from self-employed people who report the cash they receive for services rendered from clients. The same goes for gambling income received being reported on a tax return with no W-2G or Form 1099 being issued.