On federal form, gambling income not showing up if offset by loss. It does show as loss on state, but not income, so an error code comes up.

On your federal return, look for the gambling winnings on your Schedule 1, Line 8b. This will transfer to the 1040, Line 8.  The gambling losses are not used unless you can itemize your deductions. 

Massachusetts (MA) Gambling Losses: For Massachusetts purposes, losses (up to as much as winnings) aren't deductible even if they may be claimed as an itemized deduction on U.S. Form 1040 (Schedule A).

Confirm you entered the gambling winnings and losses appropriately in the same location.

• Where do I enter a W-2G?

Please update here if you need additional assistance and we will help. See the instruction to preview your 1040 below.

From the left rail menu in TurboTax Online, select Tax Tools (You may have to scroll down on the left rail menu.)

1. Select Tax Tools
2. On the drop-down select Tools
3. On the pop-up menu titled “Tools Center”, select View Tax Summary 
4. On the left sidebar, select Preview my 1040 

For TurboTax Desktop, change to 'Forms' and review the forms 

@PatS16