Just purchase a turbotax home and business software and it won't work on my Mac 10.13.6. Do you have a version that will work or should I return the software to BJ's?

I would recommend you download it by using the license number on the inside of the CD jacket.

Here are some steps you can take to troubleshoot downloading your Turbo Tax software on a Mac.

@Anonymous  - It is not a "trouble shooting" issue Mac OSX 10.14 (Mojave) or later is required for TurboTax 2020.