Is there any reason? You’re effectively wasting half the drive by using that space for OSes you almost never use.
If you ever happen to need Windows, which I don’t see happening as you yourself can’t imagine an actual use case, you can just go to the library or borrow a friend’s computer or maybe use your phone.
As for Mint, do you just have it to experiment with? If you’re just trying to try out other distros, a virtual machine or even live USBs are much easier ways to quickly try out new systems without having to clear actual partitions.
If you had much more storage then sure, waste some of it, but you’re really gonna be missing that 120gb if you use your computer for… basically anything.
The order of the partitions basically doesn’t matter at this point – I think having a boot partition first used to be important for MBR schemes but I’m pretty sure in the UEFI era you can have them in whatever order. As others have mentioned, you could combine your EFI partitions, but doing so to an already installed system is slightly complex. You also could shrink some of your EFI and boot partitions, I’m not sure of the recommended sizes off the top of my head but I think they could be smaller. On the other hand, your swap partition should probably be bigger – making it the same size as your RAM is a good rule of thumb and will enable hibernation (I think).
Tax software is basically all in browser at this point.