RBizz Corporate Accountants - Resources #ATO LODGEMENT

Amending a Prior Year Tax Return: When and How It's Done

Fri, 17 Jul 2026 12:01:41 +1000

Amending a Prior Year Tax Return: When and How It's Done

Tax season has a way of surfacing things after the fact. A return gets lodged, and a few weeks later a missed deduction, an overlooked income source, or a data entry error comes to light. It's a more common situation than most business owners expect — and in most cases, it's entirely fixable.

The key is understanding when an amendment is possible, how the process works, and what it means for your outstanding tax position either way.

When You Can Amend a Return

Businesses and individuals are generally able to request an amendment to a previously lodged tax return within a set time limit, which depends on the entity type:

Individuals and small businesses typically have a standard amendment period of a set number of years from the date the original notice of assessment was issued.
Larger businesses may have a different (often shorter) amendment period, depending on their classification.
Certain circumstances — such as fraud or evasion — can extend the period the ATO can review or amend a return, in either direction.

Because these time limits vary and are periodically reviewed, it's worth confirming your specific amendment period with a registered tax agent before assuming a correction is (or isn't) still possible.

Common Reasons Businesses Amend a Return

A deduction was missed — often identified during a later review, or after realising an expense category (like depreciation or home office costs) wasn't fully claimed.

Income was left out — a forgotten invoice, an overlooked bank interest amount, or income from a source not initially considered taxable.

A data entry or calculation error — simple mistakes in figures transferred between accounting software and the return itself.

A change in classification — for example, realising an amount treated as a loan should have been treated as income, or vice versa.

Updated information from a third party — such as a corrected income statement, dividend statement, or trust distribution advice received after lodgment.

How the Amendment Process Generally Works

Identify the specific error and the correct treatment. This usually involves reviewing the original return alongside supporting records to confirm exactly what needs to change.

Lodge an amendment request, either through a registered tax agent or directly via the ATO's online services, specifying the item being corrected and the reason.

Wait for the amended assessment. The ATO will issue a new notice of assessment reflecting the correction, which may result in additional tax payable, a refund, or no change to the amount owed.

Address any resulting balance. If the amendment increases the amount owed, interest may apply from the original due date — but voluntarily correcting the error is treated very differently to being caught out in a review, both in terms of ATO approach and any penalty consideration.

Why Acting Early Matters

Amendments initiated voluntarily, before the ATO identifies the issue independently, are generally viewed far more favourably than errors uncovered through a compliance review. Voluntary disclosure can also reduce or eliminate penalties that might otherwise apply, even where interest on any additional tax is still payable.

Waiting doesn't reduce the amount owed — it usually increases it, through accruing interest, and removes the goodwill that comes from raising the issue proactively.

What to Do If You Think a Past Return Needs Correcting

If something's come to light — a missed deduction, an income discrepancy, or simply uncertainty about whether a prior return was handled correctly — it's worth a review before assuming it's too late or too complicated to fix. In most cases, it's neither.

RBizz reviews prior-year returns and manages the amendment process directly with the ATO — schedule a free consultation if something doesn't look quite right.

Tax Season in Australia: What Companies, Businesses & Sole Traders Need to Know

Thu, 09 Jul 2026 18:18:16 +1000

Tax Season in Australia: What Companies, Businesses & Sole Traders Need to Know

Tax season doesn't look the same for every business. A company, a small business partnership, and a sole trader all sit under the same ATO calendar — but the obligations, paperwork, and risks each one faces can be quite different.

Understanding which rules apply to your structure isn't just about compliance. It's about making sure you're not overpaying, under-preparing, or missing something your entity type is specifically exposed to.

Here's how tax season breaks down across the three most common business structures in Australia.

Companies

Companies face the most structured — and often the most complex — reporting obligations of the three.

What applies to you:

Company tax is a flat rate (currently 25% for base rate entities, 30% for others) — not dependent on the owner's personal income like a sole trader.
Company tax returns are generally due by 28 February for companies not using a tax agent, or later if lodging through a registered agent's program.
Directors have separate obligations, including Director ID requirements and personal liability exposure for unpaid PAYG and SG amounts under the Director Penalty Notice regime.
Franking credits and dividend distributions add another compliance layer if the company pays dividends to shareholders.

What to prepare now: Reconcile trial balances, confirm any Division 7A loan repayments are on track, and review whether retained profits should be distributed or reinvested before year-end.

Businesses (Partnerships & Trusts)

Partnerships and trusts sit in the middle — they lodge a tax return, but generally don't pay tax at the entity level. Instead, income flows through to partners or beneficiaries.

What applies to you:

The entity itself lodges an information return, but tax is paid by the individuals/entities receiving the distributed income.
Trust distribution resolutions must generally be finalised before 30 June — missing this can result in the trustee being taxed at the top marginal rate on undistributed income.
Partnerships need clear, documented profit-sharing arrangements, especially if they've changed during the year.
GST and PAYG withholding obligations still apply at the entity level if registered and employing staff.

What to prepare now: Confirm trust resolutions are drafted and signed before the cut-off, and review partner drawings against actual profit share to avoid surprises at tax time.

Sole Traders

Sole traders have the simplest legal structure — but that doesn't mean the simplest tax outcome, since business income is taxed at personal marginal rates.

What applies to you:

Business income and expenses are reported on your individual tax return (via a business schedule), not a separate entity return.
There's no company tax rate to fall back on — profit is taxed progressively, which can mean a heavier tax burden in a strong year.
PAYG instalments are common for sole traders once income crosses ATO thresholds, meaning tax is paid throughout the year, not just at lodgment.
Superannuation isn't compulsory for yourself as a sole trader, but voluntary contributions can be a valuable tax-planning lever.

What to prepare now: Review whether your income level this year makes moving to a company or trust structure worth exploring, and check your PAYG instalment amount reflects your actual current income.

The One Thing All Three Have in Common

Regardless of structure, the businesses that move through tax season smoothly all do the same three things:

Keep records current, not retrospective. Monthly reconciliation beats a scramble every June.
Know their specific lodgment dates. "Tax season" isn't one date — it's a calendar of dates that differs by structure and lodgment method.
Talk to their accountant before decisions, not after. Structure changes, distributions, and large purchases are far easier to plan for than to undo.

The Getting the Right Structure Working for You Line

Whether you're a company managing director obligations, a trust finalising distribution resolutions, or a sole trader weighing up whether it's time to incorporate, the right guidance early in the year makes tax season a formality rather than a fire drill.

Rbizz Corporate Accountants works with companies, partnerships, trusts, and sole traders across every stage of the tax calendar — schedule a free consultation to see where your business stands.