Online is now closed. You can buy the download Desktop program here https://turbotax.intuit.com/personal-taxes/past-years-products/
Or 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
or if you want bigger type use 1040SR for Seniors,
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