I'm pretty sure it refers to the tax year in question. (Though I am a bit unsure)
So you'd need a copy of your earlier state tax form to enter that.
BUT
......but if you used the STD Deduction on that year's Federal tax return, it's fairly immaterial, since the state refund wouldn't be included now in Federal income anyhow...in which case, your entry of the state refund doesn't really do anything and isn't really important.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
