Keep in mind Turbotax limits s/w to activation for versions 2019 onwards to current tax year and 3 prior years - however I don't think you will be able to download the old versions you bought for Windows onto the Mac as the downloads are OS specific; so you'll probably be starting from scratch with 2025 (be sure to export PDF with all forms and worksheets for your old returns, and presumably you'll keep the old laptop around for quite a while).
If you've not purchased a machine yet suggest looking into the Mac Mini you can get a very simple affordable solution which plugs into 3rd party monitors etc. If you need a keyboard at some point I highly recommend the Logitech MX Keys S for Mac rather than the apple keyboard (more expensive and I found it to have a very flat profile)
If you have questions on the migration there is a good discussion forum on Apple support site with responsive experts. They will probably recommend using Migration Assistant, info below
https://discussions.apple.com/community/macos
https://support.apple.com/en-us/102565
Good luck!
