If you transferred last year’s tax data to this year's return, your state and local refunds are automatically brought over with your other tax info.
If TurboTax brought automatically the state refund and you entered your 1099G form for state and local refund, you are doubling the state refund.
Follow the instruction if you need to delete the 1099G form:
I did not enter it in - it doubled mine automatically, I checked and there is no form in my documents section.
The 1099-G is not in your documents. You need to sign in to TurboTax on a browser. Then you will be able to see Tax Tools and follow the directions above to delete your 1099-G form.