State of Ohio eFile rejected due to W-2G issue

[LizPS]

error issue:  W-2G claimed state income tax withholding but did not provide the state abbreviation.  It's entered on Line 13 but I'm getting eFile error and rejection.  Can anyone help?  Am I missing something?  The tax withheld is included in total on OH IT-40.

[RollTide68]

What state was the casino/W-2G issuer in?  My guess is that is the state you would enter.

[LizPS]

The issue may be a technical one because the winnings were in Ohio and I have entered OH on line 13 of the W-2G worksheet.  I don't understand efile rejection.