Any person, whether natural or juridical, required under the authority of the Internal Revenue Code to file a return, statement or other documents, shall obtain a Taxpayer Identification Number (TIN) to be indicated in the return, statement or document to be filed with the Bureau of Internal Revenue, for proper identification for tax purposes. You will be using the TIN for anything that has to do or relates with tax filing. It would be wise to get your Philippine Taxpayer Identification Number first before you apply for a job to facilitate the recruitment and hiring documentation process.
If you are a Filipino and is living here in the Philippines, you should get your Philippines Social Security Number and ID as soon as you are of age and are allowed to become a member. Basically, the SSS provides for a replacement of income lost on account of aforementioned contingencies. With the Philippines Social Security Number you enjoy sickness benefits, maternity benefits, disability benefits, retirement benefits, death benefits, and funeral benefits.