I want to file a 2021 tax year

If you have a simple return and want to file for free you can fill out the forms by hand.  Here are some basic forms.....

Here is the 2021 1040 return

https://www.irs.gov/pub/irs-prior/f1040--2021.pdf

or if you want bigger type use 1040SR for Seniors,

https://www.irs.gov/pub/irs-prior/f1040s--2021.pdf

2021 1040 Instructions

https://www.irs.gov/pub/irs-prior/i1040gi--2021.pdf

2021 EIC and Tax Tables

https://www.irs.gov/pub/irs-prior/i1040tt--2021.pdf

Child Tax Credit form 8862

https://www.irs.gov/pub/irs-pdf/f8862.pdf

Schedules 1-3

https://www.irs.gov/pub/irs-prior/f1040s1--2021.pdf

https://www.irs.gov/pub/irs-prior/f1040s2--2021.pdf

https://www.irs.gov/pub/irs-prior/f1040s3--2021.pdf

Don’t forget your state.  And you will have to print and mail your returns.  So be sure to attach copies of your W2s and any 1099s that have withholding on them.  You have to mail federal and state in separate envelopes because they go to different places.  Get a tracking number from the post office when you mail them for proof of filing.