A 1099-G can report several things.
If it is for unemployment, it will be for unemployment you received in 2020;
HOWEVER, if it is for a State Tax Refund, the program might ask about your 2019 Tax Return because a state tax refund received in 2020 would have been for the state tax return you filed for tax year 2019.
Please verify that you are entering the 1099-G in the correct section.