After you file

What does "not working" mean?  Does it mean nothing happens--is the 2017 link "download/print the PDF"  dead--or does it ask you to pay to access the 2017 return?

Are your 2017 and 2018 returns in the same account?  And did you pay the 19.99 for PLUS by credit/debit card?   You can't use the option to "pay later" out of the Federal refund for this purpose.   If you didn't pay by card, we can tell you how.