What refund? A 1099G for a state refund?
To enter a state refund just type 1099-G (with the dash) in the search box at the top of your return and click on Jump To it.
OR Enter the 1099G under
Federal on left
Wages & Income at top
Scroll down to 1099-Misc and Other Common Income
You might need click on Show More to expand the section
Then it's the first line for Refunds Received for State/Local Tax Returns - Click Start
You do not want the next line that says Other 1099G Income
On the first screen check YES - Received a State Refund.
A State Tax Refund is taxable if you itemized deductions on that prior year's federal return and took a deduction for state income taxes instead of the sale tax. You got a deduction benefit for it so now you have to include it as income. If you took the standard deduction or filed a 1040EZ or 1040A it is not taxable and you don't need to report it.