Tax notices are one of the most stressful and time-consuming parts of a CA or CPA's work. A single notice — whether from India's GST department, the US IRS, UK's HMRC, Australia's ATO, or Canada's CRA — can take 4–8 hours to respond to correctly. The letter must cite the right legislation, adopt the right register, address each issue the tax authority raised, and meet a hard deadline. Miss the deadline, and your client loses their right to object. Draft a weak response, and the authority pursues a stronger penalty.
OpsOracle AI has built the first global tax notice AI platform for CAs and CPAs — five jurisdictions, five specialist AI modules, one platform. All powered by Claude AI (claude-haiku-4-5-20251001 for extraction, claude-sonnet-4-6 for letter drafting and research), all citing specific legislation, all with built-in professional review gates that ensure AI augments the CA's work rather than replacing their professional judgement.
The five modules
GSTGuard — India: Handles ASMT-10, DRC-01, DRC-07, ADT-01 GST notices. Extracts GSTIN, tax period, ITC claims, and disputed amounts. Drafts response letters citing CGST Act 2017, IGST Act 2017, and CGST Rules 2017. Notice of Objection under s107 CGST Act.
IRSGuard — USA: Handles CP2000, LT11, CP504, CP90, and IRS collection notices. Extracts EIN, TIN, tax year, proposed changes, and response deadline. Drafts CPA response letters citing the Internal Revenue Code, Treasury Regulations, and IRS Revenue Procedures. CP90 (Final Notice of Intent to Levy) never gets an auto-draft — requires specialist response.
HMRCGuard — UK: Handles SA370, CT620, VAT654, CC/FS1, COP8, COP9. Extracts UTR, VRN, tax year, and amount in GBP. Drafts CA response letters citing TCGA 1992, ITA 2007, CTA 2010, VATA 1994, Finance Acts. COP9 (criminal investigation) never auto-drafts — requires specialist tax barrister.
ATOGuard — Australia: Handles DPN, Audit Letters, BAS Assessment, Income Tax Assessment, SGC, FBT. Extracts ABN, TFN, tax period, amount in AUD. Drafts Tax Agent response letters citing ITAA 1936/1997, TAA 1953, GST Act 1999, SGAA 1992. DPN never auto-drafts — 21-day personal liability window requires specialist counsel.
CRAGuard — Canada: Handles NOA, NORA, T1/Corporate Audit, GST/HST Assessment, Requirement to Pay, Director's Liability. Extracts SIN, BN, tax year, amount in CAD. Drafts CPA response letters citing ITA R.S.C. 1985, ETA R.S.C. 1985, CPP Act, EIA. Requirement to Pay and Director's Liability never auto-draft — personal liability risk requires specialist counsel.
Tax Research AI: ask anything across 9 jurisdictions
Beyond notice management, OpsOracle AI includes a Tax Research AI powered by Claude Sonnet. Ask any tax question — in any of 9 jurisdictions (IN, US, GB, AU, CA, DE, JP, KR, or GLOBAL for cross-border) — and get an answer that cites specific legislation sections, treaty provisions, and relevant case law.
Example questions it handles: — What is the CGT discount for Australian individuals on assets held over 12 months? — How does the CRA treat employee stock option benefits under ITA s7? — What are the GST registration thresholds in each Australian state? — How does HMRC's IR35 off-payroll working rule apply to PSCs? — Under BEPS Action 13, what documentation is required for Australian multinational tax?
Every answer includes a professional disclaimer and reminds the CA/CPA to verify legislation citations and seek formal advice before acting.
The safety architecture: where AI stops
The most important design decision in OpsOracle AI is knowing when NOT to generate a draft. Five notice types across the five modules get a red alert and explicit 'no auto-draft' treatment:
1. India GST: Pre-litigation notices and SCN adjudication 2. USA IRS: CP90 Final Notice of Intent to Levy (potential jeopardy levy) 3. UK HMRC: COP9 (Code of Practice 9 — criminal investigation) 4. Australia ATO: DPN (Director Penalty Notice — 21-day personal liability) 5. Canada CRA: Director's Liability Assessment + Requirement to Pay
For all other notices, the AI generates a draft, but every draft is clearly watermarked 'AI-Generated Draft — Professional Review Required Before Submission.' The CA reviews, edits, verifies facts and figures, signs, and submits. The AI writes the first 90% of the letter in 60 seconds. The CA provides the final 10% that only a licensed professional can provide.