There are a couple of solutions:
- Try H&R Block's tax prep software. I used it, but to be honest, I prefer TurboTax
- Run a MacOS 10.15 virtual machine using VirtualBox, VMWare Fusion or Parallels Desktop.
I hadn't even thought of the second option until just now. VirtualBox is free, and I've used it a little bit, seems OK. It's be worth trying. Parallels Desktop costs money, but is a dedicated Mac product. To get full support you have to pay for a subscription plan. VMWare Fusion also costs money, but I notice they now have a "free" version which looks like it's adequate to run a MacOS VM on a Mac. However, VMWare acquired Fusion, and their Mac support doesn't seem great. But to just run TurboTax, I think any of these will work.
