Did you buy the Download from Costco Online? I bought mine today too. I have Windows 10. Here's how mine went.
I clicked on the link in the email, then chose PC Download. It automatically went to my Downloads folder.
I double clicked on the file to to install it. It installed FAST! It launched and updated. Hasn't asked for the Activation code yet. It said to continue but nothing happened.
So I clicked on the Desktop Icon - got a sign in box. Had to log into my Turbo Tax account. They emailed me a code to verify me.
Then got the Activation box and entered the 16 digit code and was in.
