We have no idea whether you need to amend your 2017 return since you have not told us what you think is wrong with it. Why do you think you need to amend?
DO I NEED TO AMEND/
Select your tax year for amending instructions:
You asked why I think I need to amend My 2017 return?
my answer: 1st week of April 2021, received a 2017 Corrected 1099R to a lower dustribution then previously reported on 2017 1040 return.
If you are going to amend in hope of a refund---do so right away---you only have until May 17 and then it will be too late to get a refund for an amended 2017 return.