Prepare, save and submit correctly
Preparers can draft and route forms; approvers can review and submit forms and supporting documents to IRAS. Prepare employee, employment and income details before starting. The page warns of a 20-minute idle timeout and retains drafts for 21 days. Uploaded documents are not preserved when leaving the page or saving a draft, so attach them when ready to submit. A successful final submission produces an acknowledgement that can be saved or retrieved from View Notices.
AIS data and the right amendment type
Where prior-year income has already been transmitted through AIS, follow the prompt on whether changes are needed rather than duplicate an unchanged amount. An Amended IR21 replaces the previous Original or Amended form and therefore requires the full revised income set. Additional IR21 concerns qualifying post-cessation benefits taxed in the payment year. If only withheld monies change, the page directs the employer to notify IRAS rather than submit an amended form. Confirm the income’s taxation year before choosing the form type.
Official source
A concise, independent Apex Gateway guide based on the official English source, not a reproduction of the complete document. Consult the original for full conditions, exceptions and subsequent updates.
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