Yes. You should
For the year of assessment 2020/2021,
The basic tax calculation is consist following amounts. if your income exceed the following you have to pay the income tax. Therefore need to register.under Income tax
Tax Free allowance 3,000,000
Other Relief (Conditions to prove) 1,200,000
Such Conditions are:
Medical Expenses
Expenses on Medical insurance premium
Educational Expenses
Interest paid on Housing Loan
Contribution on approved pension fund, etc