How responding to the ATO usually works
Effective responses follow a simple path: identify the notice, confirm the deadline, gather evidence, prepare a clear reply, and submit through the channel the ATO requested. If a lodgment is overdue, bring the bookkeeping up to date first, then lodge accurately.
- Identify the ATO notice type and reference number.
- Note the response date and any lodgment or payment deadline.
- Collect records: BAS, tax returns, payroll reports, bank statements, invoices and prior ATO letters.
- Decide DIY vs professional support. If you’re short on time or confidence, involve a registered agent.
- Respond in writing to each ATO question and attach evidence. Keep copies and call reference numbers.
Common ATO letters and how to respond
Overdue lodgment reminder
Update bookkeeping, prepare the return (BAS, income tax, PAYG), and lodge. If you cannot meet the date, call the ATO for time to comply.
Data-matching review
Provide reconciliation between ATO data and your records. Supply bank statements, invoices and payroll reports that support the figures.
Audit notification
Engage a tax professional early. Prepare a document list, secure records, and coordinate communication to avoid inconsistent responses.
Debt or payment demand
Confirm debt balance, check for unprocessed credits, and assess cash flow. Set up a payment plan before the due date to reduce escalation.
Default assessment
Act quickly. A default assessment is the ATO’s estimate. Provide accurate returns and evidence to replace it, or lodge an objection on time.
Disagree with an ATO decision
Request reasons, then lodge an objection with evidence within the statutory time limit. Professional guidance is recommended.
Timeframes, penalties and interest
- Most letters require a response within 14–28 days. Ask for more time before the due date if required.
- Late lodgment penalties and general interest charge can apply. These grow over time—early action limits cost.
- Accurate lodgment is better than hurried lodgment. If data is incomplete, seek time to comply while you reconstruct records.
- Payment plans are often available. Propose an amount you can sustain and make the first payment on time.
What your accountant will need to respond well
- A copy of the ATO letter, notice number and due date.
- Recent BAS and tax returns, payroll reports, and superannuation records.
- Bank statements and source documents supporting disputed or queried amounts.
- Details of any prior ATO calls (including reference numbers) and payment plans.
- Access to your accounting software and a list of outstanding lodgments.
Australian context to keep in view
- Use registered practitioners. For tax matters engage a registered tax agent; for BAS-related matters a registered BAS agent can assist.
- “Time to comply” is common. If you engage help, notify the ATO and request a realistic timeframe to avoid penalties.
- Cash flow pressure is normal. Payment plans help prevent escalation and preserve running a business while you catch up.
- Good record quality reduces audit risk. Clear reconciliations and evidence lead to faster, cleaner outcomes.
What to compare before you commit
Scope
Confirm the engagement covers the real issue behind responding to the ATO: bookkeeping catch-up, lodgments, evidence preparation, representation and follow-up.
Software fit
Choose a provider fluent in your tools (e.g. Xero, MYOB, QBO) and able to explain the workflow from records to lodgment.
Turnaround and communication
Ask about response times, who handles ATO calls, and how urgent matters are escalated during peak periods.
Commercial fit
Compare fixed-fee vs hourly, expected total cost, and whether you need compliance-only or ongoing advisory support.
Best next steps
Write down your objective (e.g. answer a data-matching query, clear an overdue BAS, set up a payment plan, or prepare an objection). Gather the records that support that outcome, then shortlist providers who can show a clear plan and timeline.
Use the related ATO pages to move from a broad question into the most relevant subtopic before you make contact.
Frequently asked questions
What should I do first when I receive an ATO letter?
Open it, identify what is being requested, and note the due date. Gather relevant records and decide whether to engage a tax or BAS agent. If you need more time, contact the ATO before the due date.
How quickly do I need to reply to the ATO?
Typically within 14–28 days, though some notices require faster action. Ask for an extension early if you cannot meet the deadline.
Can I set up an ATO payment plan?
Yes, in most cases. Propose an amount you can sustain and make the first payment on time to avoid escalation.
What if my records are behind?
Request time to comply while you bring the books up to date. Accurate lodgment backed by evidence is the safest route.
Do I need a professional to respond?
Simple clarification letters can be DIY. For complex, high-value or time-pressured matters, a registered agent reduces risk and delays.