Upgrading Mac from Catalina to Big Sur to support TurboTax2022

They support Monterey. See the following from TurboTax https://turbotax.intuit.com/personal-taxes/cd-download/tta-system-requirements for the system requirements for their 2022 download version:

• macOS Big Sur 11 or later (macOS Catalina 10.15 not supported)
  • Specific macOS: macOS Big Sur 11, macOS Monterey 12, macOS Ventura 13

If you had elected to use their online version (which is excellent in my opinion) your Catalina or even older Mojave would be supported. Something to consider in the future. See: https://turbotax.intuit.com/personal-taxes/online/system-requirements

Regarding the upgrade, I would upgrade to the latest version your Mac supports (which would be Monterey if it is a 2015). Catalina was a major upgrade due to being the last version to support 32 bit apps so you shouldn't experience a hassle going from Catalina to Monterey.

TurboTax 2022 runs fine on Monterey. I have had no problems installing, updating or using it on Monterey 12.6.3 (the final version of Monterey). Just finished my returns last week; all went well.

Only Intuit can say if they do/will support their software on Monterey or Ventura, so that's a question to ask them.

If you keep your macOS updated regularly, then your major upgrades to newer versions tends to go more smoothly.

And of course, the follow applies before you do any upgrade:

❗️– IMPORTANT! – Backup your data. (You’ve been warned.)

Learn How to Back up your Mac with Time Machine:

Back up your Mac with Time Machine - Apple Support

This is primarily a user-to-user support forum; other Apple users like you.

We aren't allowed to contact or work with people directly, only through this forum. You can ask questions here anytime and are likely to get answers from one or more people.