I’m completing my federal return and imputing my 1099-G for Indiana Unemployment. It’s saying to enter a number for box 10b, but my form only has boxes 10a &12a.

If there were not any state taxes withheld and reported in box 11 of your Form 1099-G, then you do not need to complete boxes 10a and 10b.  Leave all three boxes blank, even the drop-down box showing your state.  

If you are using TurboTax Online, there is a place to enter local income tax withholdings and locality name.  Only enter this information in both boxes if local taxes were withheld.  If your form only shows a locality, but no taxes withheld, then leave both boxes empty.  (If you are using a CD/downloaded version of TurboTax, there is no place to enter any locality information.  That information would need to be handled separately when completing the local tax return if applicable.)

[edited 1/25/2021 | 2:12 pm PST]

Thank you for your reply, but I am still confused. There were state taxes withheld. I have my state, IN, listed in box 10a on my 1099-G, along with the amount withheld in box 11. Turbo Tax is telling me I also need to enter what’s in box 10b on my 1099-G, but my form does not have a box 10b. 

Look to see if the bottom of your hard-copy has a state identification number along with the rest of the information that is on the bottom of the form. Also double-check to make sure that you reported your 1099G as Unemployment Benefits. The State identification number may be listed as an EIN number on your hardcopy and is a nine-digit number. Record that number in Box 10B as Turbo Tax instructs you to do.

That resolved the issue. Thank you!