How do I file my 2021 Tax Return?

If it is not postmarked by midnight tonight on 4-15-2025  the refund will be forfeited.  2021 cannot be e-filed.

2021

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

Here is the IRS 2021 Form 1040
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

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

2021 Tax and EIC Tables
https://www.irs.gov/pub/irs-prior/i1040tt--2021.pdf

Sch 1 : https://www.irs.gov/pub/irs-prior/f1040s1--2021.pdf
Sch 2 : https://www.irs.gov/pub/irs-prior/f1040s2--2021.pdf
Sch 3 : https://www.irs.gov/pub/irs-prior/f1040s3--2021.pdf

To file your 2021 tax return using TurboTax, you'll need to use their desktop software, as the online version only supports the current tax year. Here are the steps:

Purchase and Download TurboTax Desktop Software:

• Visit the TurboTax Past Years' Products page to purchase and download the 2021 software.

For more detailed guidance, you can refer to the TurboTax Help Article on Filing Prior Year Returns