The purpose of filing tax exemption is to reduce the income tax amount.
If you don't need to pay income tax (your income tax is RM0), what's the point of of filing tax exemption?  There's no tax to be exempted/reduced in the first place.

(Do you want to make your income tax becomes negative so government pay you money instead?  )

Once you started filing, every year need to file (declare). In your case, after you fill up the form or e-filing, the auto calculation will show you no taxable amount.
So, you submit, and then print/softcopy and keep for 7 years.

In this way, every year you have submission and record tracking.

The purpose of filing is not only to reduce the tax amount or to claim back.
It will be good for you to declare your income in order to you to secure your loans from bank.

For employed under BE form, the process of declaration take less than 10 mins.
Why fret over such a simple task ?

Nope, you still need to fill up everything. Unless you are telling that your salary won't increase over the years.
This is more on preventing you on getting audited for no reason next time