Just saw your post on another thread.

So, just to be clear, if your EFIN is for your practice in the US, you can't use that EFIN for a practice you may set up in the Philippines.  You will need to apply for and use the EFIN issued for the Philippines.

Intuit's server will not block your access just because you're based outside the US.  But they will need to set up your overseas address and verify your EFIN manually since their system cannot accommodate frontend entries for foreign countries and phone numbers.