Tax and Tax Return. Please help

Hello every one. I hope you are keeping well with the pandemic. I have some questions and I would be really thankful if you spare some time and answer me. I have been offered a job in Malaysia. Expected salary is 15k.  Now please answer my following questions.
1. How much tax I am supposed to give?
2. How much tax I am supposed to refund?

Please give me detailed answer

Dear Kantaprasad, thank you very much for your detailed reply, however I am very bad at tax things, and the whole details you have shared I understood less than 20% :) Im sorry:) I opened the link you have given and according to that my annual salary will be 180000, so I fall in the 24% tax category. Does that mean I will pay 24% of my monthly salary? if yes, how much rebate/refund I can get. Please make some simple examples for my understanding. Thanks