How to download your software purchase. This has instructions for getting both Windows and Mac. See How to switch between Windows and Mac
https://ttlc.intuit.com/community/installing/help/how-do-i-download-the-software-i-purchased-at-turb...
If you have not yet downloaded the software you paid for then sign onto your download account - https://shopping.turbotax.intuit.com/unified/downloads?route=myaccounts
Install the TurboTax software on your personal computer and start the program. You will be asked to provide the license code.
See this TurboTax support FAQ for license code - https://ttlc.intuit.com/community/tax-topics/help/i-can-t-find-my-license-code/01/852973
