If you have not applied for AIS, here are the steps for you to manually submit your IR8A forms:
After checking all the IR8A forms, you can choose to "Download all IR8A forms" as physical copies instead.
Thereafter, physically sign on the forms and pass** them to your employees by 1 March so that they can report their own income over at myTaxPortal. 😀
**NOTE: Do refer to IRAS website for more details under the "Employers not under Auto-Inclusion Scheme (AIS) for Employment Income" section.