cannot activate software with license code that I purchased at Costco. premier package purchased..feel like its tryimg to sell me new online package help?

How did you try to install it?  Are you using these instructions?  How to get started with the Desktop program, install and activate it
https://ttlc.intuit.com/turbotax-support/en-us/help-article/product-delivery/download-software-turbotax-com/L7u9oLEkq_US_en_US?uid=luqgvzrd

You are using the TurboTax online editions, not the software you purchased.

See this TurboTax support FAQ for installing the desktop software with a license code - https://ttlc.intuit.com/turbotax-support/en-us/help-article/license-information/install-turbotax-cd-download-software-license-code/L1wFOSXur_US_en_US?uid=m8lyxjot

For installation and software issues you can contact the TurboTax Support Phone Number