enter the W2-G amount. then on the other income worksheet enter a negative amount to offset and describe it as gambling winnings reported on schedule C. thus the iRS should be able to mach up the form and you have given them a roadmap as to where the amount ended up
if the IRS sends a notice. then you can call the number on it to explain and ask if anything further is needed. if this is your first year filing as a pro gambler, you stand a higher risk of being audited. the IRS would want to see that your activities rise to the level of professional gambler.
if this is relevant, i providing a link that provides some guidance as to what the IRS looks at.
https://www.journalofaccountancy.com/issues/2016/oct/taxes-for-gamblers.html
