What do I need to do regarding the TM30 registration if my landlady has registered me online?

The TM30 registration process involves your landlady notifying immigration about your stay. You should ask her for a confirmation receipt, as the responsibility primarily falls on the house owner. If she registered you online, there may not be a physical receipt. Instead, she can take a screenshot of the registration confirmation after searching for your data in the system. If you travel back to your primary address, you do not need to re-register. Further information on the TM30 can be found on official immigration websites.