Well here is the scoop if the PDF you can download right now is incomplete ....
Right now the 2019 returns are being archived so if you did not save a PDF of the complete return using the print center BEFORE the online system closed this year on 10/31 you will need to wait until early December when the Online system opens back up for the 2020 tax year.
If you need a copy before then ...
Go to this IRS website for free federal tax return transcripts - https://www.irs.gov/individuals/get-transcript
For a fee of $50 you can get a complete federal tax return from the IRS by completing Form 4506 - http://www.irs.gov/pub/irs-pdf/f4506.pdf