You can purchase the CD online directly from TurboTax at https://turbotax.intuit.com/personal-taxes/cd-download/
You just download the installer after you pay for it, double-click the downloaded file and install it. You'll need the Deluxe version or higher for rental property. Make sure you get the right flavor also. There's one for Windows and one for MACs. So if you get the wrong one, you own it. It's a pain dealing with TTX to swap it out for the right one.
You may also be able to get it cheaper from a 3rd party source. Just make sure its an authorized reseller of the product. Places like Wal-Mart, OfficeMax, Target are fine. I'd be wary of buying from 3rd party retailers on Amazon though.
Also make sure you get the one for the tax year you want. Since TurboTax 2022 is not out yet, you'll want TurboTax 2021. Since tax laws change every year, the program changes every year to keep up. So trying to use TurboTax 2020 to complete your 2021 tax return won't work out to well.
Also, just so you know, since the program does have to change every year to keep up with tax law, you have to purhase the program each tax year. The nice thing about the CD version is that you pay for the program "ONE TIME" and that's it. You can complete as many tax returns for the tax year purchased, as you need to. However, there is one catch and it's an IRS requirement; not a TurboTax requirement.
With the CD version you can only e-file a maximum of 5 returns. After that, you can still complete more tax returns for that same tax year. But you have to print, sign and mail them to the IRS.
Finally, with the CD version it comes with an activation code you must enter in order to use it. That code only works 5 times. So you can only install the program on 5 computers at the most. A reinstallation of the program on the same computer also counts as one of the 5. So when you get the CD, do not lose the activation code.
Not that the above limits may apply to or affect you. But I do want you to be completely aware.
