In which situations must you go to the immigration office after entering Thailand with a valid visa?

Upon entering Thailand with a valid visa, you generally need to handle your address registration, particularly through the TM30 form. This process usually involves coordination with your landlord regarding who will register your address at the local immigration office. If you're staying in Bangkok, it's advisable to consult local articles or expat groups for detailed guidance on the specific steps you must take following your arrival.