You should receive your license number in your welcome email after signing up for a new account.
Please remember to credit the artist of the tubes you work with from Jenn's Designs as described below:
( Ex: ) ©ArtistName/www.jennsxdesigns.com/JD_123
you may also add your designer name at the end if you would like too
You can find the artist information on each preview containing a tube, as well as in the product descriptions.