How to update my MacBook from macOS Catalina to macOS Monterey.

If you do not have a MacBook Pro 2015+ model, then macOS is not supported on your Mac. See this Apple article for the system requirements for macOS 12.x Monterey:

macOS Monterey is compatible with these computers - Apple Support

If your Mac does not meet the minimum system requirements for macOS Monterey, then you will need to get a newer Mac.

What is the exact model of your Mac? You can get this information by clicking the Apple menu and selecting "About This Mac". The Mac model determines whether you can upgrade to macOS Monterey.

Monterey…

macOS Monterey is compatible with these computers - Apple Support

• iMac – all models from late 2015, iMac 16,1 – 20,2
• iMac Pro – all models, iMac Pro 1,1
• MacBook & MacBook Retina – all models from early 2016, MacBook 9,1 – 10,1
• MacBook Pro – all models from early 2015, MacBook Pro 12,1 – 17,1
• MacBookAir – all models from early 2015, MacBook Air 7,1 – 10,1
• Mac Mini – all models from 2014, Mac Mini 7,1 – 9,1
• Mac Pro – all models from 2013, Mac Pro 6,1 – 7,1

https://wpbeaches.com/apple-minimum-system-requirements-for-macos-monterey-12/

https://apps.apple.com/us/app/macos-monterey/id1576738294

macOS Monterey on the App Store (apple.com)

https://apps.apple.com/us/app/macos-monterey/id1576738294?mt=12

Monterey full installer.app

Why does OSX Monterey 12gb download turn … - Apple Community

If the computer does Not Qualify to upGrade to macOS 12 Monterey

That can be established by following either or both previous requests for re - About this Mac

You can always use the On-Line version of Turbo Tax

Since I am located outside the USA, the above link is for Canada