How is tax calculated when you earn from swing trading and premiums from selling options?

Hi all, I recently opened an account with TD Ameritrade and deposited enough capital to be flagged as PDT. So I've been swing trading a few stocks and also collecting premiums by selling puts.

Was wondering how does the tax work in Singapore for this case? Will TD submit our earnings or do we have to file our earnings ourselves?

P.S: This is my first year in the investing/trading world would like to find out more information/ article regarding this topic! Cheers