Why am I required to submit a 2316 and 1902 by my employer?

If you already have a TIN & do not have a copy of your 1902 application,
provide a copy of your TIN card instead

WHAT IS BIR FORM 2316:

The 2316 is "Certificate of Compensation Payment/Tax Withheld". It is a certificate issued by ones employer for taxes that they are required to withheld every month. Which they should file and remit each month.

Problem with going AWOL

Avoid future problem of going AWOL. File your letter of resignation.
Remember you need that 2316 Certificate as proof of your tax payments.
Which is likely required by your new employer.

If you went AWOL, now that won't look good with your new employer or any employer for that matter. And your now in a dilemma as your new employer would require you to submit this 2316. This has been ask to me so many times. The problem arises when you pointed out in your interview that you were employed before and naturally you would also be asked how long you were with your previous employer.