I don't quite understand why your refund amounts don't change. Your state refund is only taxable if you received a tax benefit from deducting state income tax on the previous year. If your itemized deductions are less than the standard deduction, then your state refund is never taxable anyway. It sounds like maybe you used the standard deduction for those years?
If you already filed, you should not change your tax data file, it should reflect what was actually filed, in case the IRS has any issues or you need to amend.
For your 2017 tax return, you will go to the section on "1099-G, taxable refunds and other government payments" (I think it's call that or something similar) on the Wages and Income section and run that interview. You will be asked to double-check your state refund amount. You can correct it here to reflect the total amount of refunds actually received in 2017. The program will then ask some questions to determine if the refunds are taxable.
Note that the program is not designed to understand multi-year refunds and may get the answers wrong.
No matter when you received the refund for your 2013 tax return, the refund is only taxable on your federal return if you itemized your deductions in 2013 and received a tax benefit from the deduction (in other words, you took the itemized deduction and your itemized deduction after subtracting the refund would still be more than the standard deduction.)
The same calculation must be performed each year. Your 2014 return is only taxable now, if you itemized your deductions on your 2014 return. And so on.
If you used the standard deduction for those years, the best thing may be to just completely leave off or zero out the entry for past tax refunds, since you know they aren't taxable now. Or if some are taxable and some aren't, you will want to only enter the ones that are taxable and tell the program to just include them as income without doing the calculation; and leave off the non-taxable refunds since the calculation is not sophisticated enough to understand.
