OnBoarding.md

@@ -99,6 +99,10 @@ Be mindful when asking private questions as 'where do you live' or 'when is your
 
 Social media engagement equals tracking people - be mindful when asking for people who likes Tor to engage with our social media buttons out there.
 
+## Custom / additional onboarding steps
+
+* [TPA's new person page](https://gitlab.torproject.org/tpo/tpa/team/-/wikis/howto/new-person).
+
 ## More questions?
 
 Feel free to ask in  irc.