This is the english version of my previous post.
Every March Indonesian and foreigner who are obligated to pay tax must submit a tax report called SPT (Surat Pemberitahuan Tahunan). I used to submit the paper-based report by filled in form 1770 S and then submitted it manually to tax officer in a tax office or in a drop box site. This year I will try to submit it using a so-called service e-Filing (electronic filing).
In order to use this service every taxpayer must have an electronic identification (e-fin). To obtain it, taxpayer must fill in an application form available in any local tax office and supplement documents: copy of your national id (KTP) or passport and NPWP card must be attached. In the new tax regulation issued by government in January 2014, every taxpayer can obtain e-fin maximum 1 day either via email or via text message.