only professional tax firms have the ability to e-file 2021. you can buy Turbotax desktop software to prepare your return but that will have to be mailed in. if you are due a refund it will likely be months before you receive it. if you owe, the IRS will bill you for any penalties or interest
you can buy the app from Turbotax or various websites. be careful about websites that sell at a steep discount you might purchase malware or the license may not be valid.
here are the minimum requirements for your computer should you DIY
https://turbotax.intuit.com/personal-taxes/cd-download/tta-system-requirements
