It is asking for the federal taxable amount you will be able to get this off of your 2013 federal income tax return.
State and local income tax refunds are taxable if the refunded tax was deducted in a prior year and you received a tax benefit from the deduction in that prior tax year. Nonresident state income tax refunds are not taxable income and will not need to be reported.
So, if you didn’t deduct state and local income taxes last year, you don’t need to pay taxes on your refunds this year. For instance, if you didn’t itemize your deductions in 2013 (you took the standard deduction) then your state refund is tax free this year and does not need to be included on your 2017 tax return. (Just keep a copy of your 1099-G with your tax records.)
Please click Is My State Tax Refund Taxable and Why for more information
Where are you getting your information that nonresident state income tax refunds are not counted as federal taxable income in the same way that a resident state tax refund is (assuming you itemized deductions in the year the refund is for)? Please cite your source.