What did you download? The 2017 Desktop program or your pdf file or your tax file ending in .tax2017?
if you filed a 2017 return you need to amend it. I assume you used the Online version? How to amend,
https://ttlc.intuit.com/community/amending/help/how-do-i-amend-my-turbotax-online-return/00/27371
