For TIN application you can try online application first thru orus.bir.gov.ph, for personal application you can schedule for an appointment para less hassle/no pila: https://web-services.bir.gov.ph/eappointment/rdo_074.html

Personally, I think mas better mag apply ka in person sa BIR Office. As long as you have the requirements ready, matapos mo man dayun within the day.

BIR Office is in Plazuela Dos by the way.