Access and colleague visibility
Use myTax Portal > myTax Mail for confidential IRAS matters, personally for own taxes or through authorised company/agent access. It is not access to a spouse/friend’s account merely because you know them. Corporate/client staff need Corppass authority; the source refers to Digital Services > Others > Corppass. Authorised colleagues can view company threads sent from 12 August 2024.
Send, reply and retention
Send Mail gives a light-blue acknowledgement at top right. Individuals/individual agents check Inbox > View Mailbox; other entities/agents Email Us (myTax Mail) > Check Mailbox, opening a message to read. Icons distinguish unread/read/sent. Individual replies usually five working days, corporate five–15, complex cases longer with notification. Update contact/preferences for individual alerts and supply corporate email/local mobile. All messages auto-remove after 15 months; they cannot be manually deleted, marked unread again or forwarded to personal email. Save As PDF/Print in the thread retains a copy.
Compose and attach within limits
Complete/send within 20 minutes. Types are MSG, PDF, TIFF/TIF, JPEG/JPG, PNG, DOC/DOCX and XLS. Up to 25 files, each at most 10 MB, aggregate at most 50 MB; English filenames no more than 50 characters may contain numbers. For PDF conversion remove active content such as e-signatures first, then source Office File > Export > Create PDF/XPS. Split oversized originals without exceeding file-count/total limits, or source postal option IRAS, 55 Newton Road, Revenue House, Singapore 307987.
Download and edition
Download All retrieves ZIP attachments, requiring extraction software and a PDF reader for PDFs; the source gives Adobe Reader, 7-Zip and Stuffit examples. Those examples do not change accepted upload types. Published 27 April 2026; retain its response-time qualifications and storage limits.
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 ↗