With effect from June 2018, CorpPass will replace the e-Services Authorization System (EASY), currently in use to authorize yourself, a staff or a third-party like a tax agent, as the only authorization system.
From June, you are required to possess a CorpPass account that is assigned with IRAS GST e-Services, to log in to myTax Portal to e-File your GST returns.
You will no longer be able to log in using your SingPass / IRAS PIN.
If you are a GST-Registered Company or Partnership, you will be required to set up a CorpPass Admin Account under your Unique Entity Number (UEN). This is required in order to authorize staff or third-parties to access IRAS e-Services on myTax Portal as well as other government’s digital services.
However, if you are a GST-registered sole-proprietor, or under GST Group or Divisional registration, you will need to set up a GST CorpPass Admin account under your GST registration number.
It is important to note that the GST CorpPass Admin account can only be used to authorise staff or third-parties to access IRAS’ GST e-Services, unlike the CorpPass Admin account, which may have already been set up under your business’ UEN for other government digital services.
For more information, please refer to IRAS’ website.
Source: Inland Revenue Authority of Singapore