Yes. After you paid did you go to the customer service pickup window and get the actual package with the 16 digit License Code?
How to install and Activate the Desktop CD/Download program with a License Code
How to install TurboTax CD/Download software with license code
How do I find the License Code?
https://ttlc.intuit.com/community/tax-topics/help/i-can-t-find-my-license-code/01/852973
@baron01a
I assume you meant at a physical Costco, but if you used Costco online website, then the license code should have come in an email, normally 30-60 minutes after the order was finalized.
For installation and software issues you can contact the TurboTax Support Phone Number