Ask HR/Finance if they practise PCB for your salary range or not.
Ask your HR/Finance to help prepare the form to create an income tax account number.
You may/may not need to personally goto LHDN counter to open the account, depending on your company.

If u have tax file number, u need to give the tax file number to u employer. Then u just sit down and rest, u don't have to worry anymore.

It is the duty of your employer to deduct (PCB). Whether they (employer) do it or not, u don't have to worry, because u are nothing wrong in tax law.

In fact, I really don't like my employer to do PCB for me, because I don't need to worry about my tax credit. FYI, If u want to claim back tax credit, u need to bring in all sort of prove, receipt and sometime to might got into trouble if u mis-do u Borong B/BE!