It is important to start recording your officiating history as early as possible. Your history gives Head Officials and Tournament organizers an easy way to assess your skill level and where you'll fit on an officiating crew when rostering you. If you wait too long into your derby career to start collecting this information, it's hard to track down all the details.
This document is the old form, but this spreadsheet can get you started.
https://docs.google.com/spreadsheets/d/1mXjmiZ-LGFl9LBHKWwdnxXvm1yAw4PuO9o97Z_3T7tM/edit?usp=sharing
The official WTDA History document takes some more effort to set up, and can be found here: Register a New WFTDA Officiating History Document (google.com)