How to submit AIS to IRAS?

To submit the AIS file to IRAS, first you need to join AIS for Employment System, please refer to link below:

https://www.iras.gov.sg/irashome/Businesses/Employers/Auto-Inclusion-Scheme--AIS-/Join-the-Auto-Inclusion-Scheme--AIS--for-Employment-Income/

If you already join, you can upload by following below steps:
https://www.iras.gov.sg/irashome/uploadedFiles/IRASHome/Businesses/Validation%20and%20Submission%20Application%20User%20Guide.pdf

Source:
https://www.iras.gov.sg/irashome/Businesses/Employers/Auto-Inclusion-Scheme--AIS--for-Employment-Income/