If you are interested in adding an endorsement to your teaching license, you can do so by logging into your ND Teach account here.
Once you are logged into your account. you will click "Begin New Application" then "Add Endorsement - ESPB Responsible".
Then you'll be able to select from several options to choose the type of endorsement you want to add. If you took a Praxis test, the endorsement is called "Major Equivalency Praxis Endorsement"
Each endorsement does cost $80 regardless of when you apply.