The TurboTax 2019 online editions have permanently closed to make way for the 2020 online editions.
To complete and file a 2019 tax return using TurboTax you would need to purchase, download and install on a personal computer one of the 2019 desktop editions from this website - https://turbotax.intuit.com/personal-taxes/past-years-products/
A 2019 tax return can only be printed and mailed, it cannot be e-filed.
If you want to file for free you can fill out the forms by hand. Here are some basic forms.....
Here is the 2019 1040 return
https://www.irs.gov/pub/irs-pdf/f1040.pdf
or if you want bigger type use 1040SR for Seniors,
https://www.irs.gov/pub/irs-pdf/f1040s.pdf
2019 Instructions https://www.irs.gov/pub/irs-pdf/i1040gi.pdf
2019 EIC and Tax Tables https://www.irs.gov/pub/irs-pdf/i1040tt.pdf
2019 Schedules 1-3
https://www.irs.gov/pub/irs-pdf/f1040s1.pdf