An account exists but tax services are missing
The one-page troubleshooting table treats inability to enter myTax Portal and inability to find corporate-tax filing after Singpass login as access-assignment issues. Check the services assigned to your Corppass profile. The document requires all-service access or the corporate-tax filing/applications approver role for filing Form C-S/C, and directs users to the company’s Corppass administrator if the appropriate access is missing.
A completed form still cannot be submitted
A preparer can complete the return but cannot make the final online submission to IRAS under this guide. Final submission requires the approver role for corporate-tax filing and applications. If the person is intended to submit directly, the company administrator must update the role through user management. This role distinction is separate from whether the return’s tax figures are correct.
Foreign-entity access denied
For a foreign entity with an IRAS-assigned tax reference, the table describes sending IRAS the Corppass entity identifier if available, tax reference, company name, incorporation date and incorporation country for record linkage. It gives a corporate-tax email route and asks for a foreign-entity Corppass registration subject. IRAS then confirms the record update. These are the contact instructions in this source document, not a newly verified current email procedure. The source gives [email protected] and the subject Corppass Registration for Foreign Entity.
Foreign-entity service assignments and waiting period
The foreign-entity route also needs the non-UEN-entity service assignment and the corporate-tax filing/applications approver role. The document asks the user to allow at least three days after those assignments are completed before portal login. Linking records, assigning services and waiting for activation are therefore separate checks; changing a Singpass password does not address all three.
Official source
This article independently explains the substantive contents of the official PDF, including the relevant conditions, procedures and annexes. The linked document remains the authoritative source for its original wording, and later changes should be checked separately.
Read the official PDF ↗