State tax filing

Please forgive my delay, but I put this aside for a while. My question is, can I fix this by filing an amended ("corrected") 2018 tax return? Will Turbo-tax ask me again if I want to recalculate my 2017 tax return so when I answer yes it will NOT check the box in the smart worksheet? My guess is somehow I have to manually recalculate my 2017 taxes to see if taking out the 2017 refund from my state & local income taxes I received in 2018 would change the refund I received. Does that sound right?