Once you use the activation code, it is tied to one account. You can still let other family members create returns, but you would have to give them access to the account. 

I purchased premier this year and thought I could share with my family. If I give them my account info.. will there be verification codes sent?

I’m out of the country and don’t want to incur the costs of turning on my phone each time someone uses the code. The disc version was so much easier.

@barb8439 The verification codes will be sent to the phone number that is tied to your account.