IRAS (Inland Revenue Authority of Singapore) is one of the most digitally advanced tax authorities in the world — but receiving an IRAS notice is still one of the most stressful events for a Singapore business owner and their CA firm. Whether it's a Notice of Assessment querying a deduction, a GST audit requiring months of invoice records, or a Corporate Income Tax (CIT) Enquiry asking for supporting schedules — every notice requires a precise, legislation-cited response within 21–30 days.
IRASGuard automates the first 90% of the response process. Upload the IRAS notice (PDF or text). Claude Haiku extracts the UEN, Year of Assessment, notice type, issues raised, response deadline, and tax type. Claude Sonnet generates a formal CA response letter citing the Income Tax Act (Cap 134) and GST Act (Cap 117A) with specific section references. The CA reviews, verifies, signs, and submits — with the hard thinking already done.
IRAS notice types handled by IRASGuard
Notice of Assessment (s65 ITA Cap 134): Standard income tax assessment for individuals and companies — response involves confirming or contesting computation.
GST Audit (s73 GST Act Cap 117A): Comprehensive GST audit — requires gathering output tax records, input tax claims, and supporting invoices. IRASGuard drafts the opening response letter and document list.
CIT Enquiry: IRAS queries on deductibility, capital vs revenue expenditure, transfer pricing, or related-party transactions. IRASGuard drafts a detailed response addressing each query with ITA Cap 134 citations.
WHT Assessment (s45 ITA Cap 134): Withholding tax on payments to non-residents — often missed by Singapore businesses. IRASGuard extracts the WHT calculation and drafts the response or objection.
GST Assessment (s82 GST Act Cap 117A): IRAS-raised assessment for under-declared GST output tax. IRASGuard identifies each GST gap and drafts the response citing relevant GST Public Rulings.
The CA workflow with IRASGuard
1. Upload the IRAS notice (PDF/TXT) — takes 10 seconds 2. Claude Haiku extracts all key fields: UEN, Year of Assessment, notice type, issues, deadline, amount 3. IRASGuard generates a CA briefing: plain-English summary, documents to gather, penalty risk, strategy, and legislation references 4. Claude Sonnet drafts the formal IRAS response letter — ITA Cap 134 + GST Act Cap 117A citations included 5. CA reviews, adds firm-specific facts and figures, verifies legislation references, signs 6. Submit via myTax Portal or registered post
IRAS objection rights and key timelines
IRAS provides clearly defined objection rights under the Income Tax Act: — Notice of Assessment objection: within 30 days of assessment date (ITA Cap 134 s.76) — Appeal to Income Tax Board of Review: within 30 days of IRAS decision (s.79) — GST assessment objection: within 30 days (GST Act Cap 117A s.93) — Tax refund reconsideration: typically 21 days from notice date
IRAS Hotline: 1800 356 8300 (Mon–Fri 8am–5pm). myTax Portal: mytax.iras.gov.sg. Every IRASGuard brief includes the specific objection right and window for the notice type.