The downloads are specific to either Mac or Windows. You are allowed to install/download the software to any five computers that you own, but if you download to two different operating systems you will need help from customer support.
To call TurboTax customer support
https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number
Customer support is available from 5 a.m. to 5 p.m. Pacific time daily Monday- Friday
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
