Form 1099-G is used to report
different things, including state or local tax refunds, unemployment
compensation and paid family leave.
If state or local tax refunds were made to you, reported in Box 2 of Form 1099-G, you only need to include in your 2016 federal return the state and local tax refund(s) from 2015 (or a prior year), if you had taken a deduction on your federal return for paying those state or local taxes in 2015 (or a prior year). Box 3 of Form 1099-G will indicate the tax year to which the refund(s) relate. The itemized deduction for state and local taxes paid is claimed on Form 1040 Schedule A Line 5a, State and Local Income Taxes.
To enter your Form 1099-G information for state or local tax refunds into TurboTax, please see the folllowing TurboTax FAQ, "Where do I enter a 1099-G for a state or local tax refund?":