1. Navigate to account.dat.com to access your Account Information
  2. Click on User Management from the side menu and then click on the USER you want to remove from a seat.
  3. Then click EDIT
  4. Scroll down to the bottom of the page to Seat Assignmentswhere you unclick the box to remove the users seat:
  5. Before you leave the page scroll up to the top of the page to hit SAVE in the upper right hand corner of the screen. 

Note: If you have a Standard DAT Account, removing a user will not change your subscription price. For Enterprise Accounts, this depends on your account setup. If you're unsure, contact your account representative.