Pre-lodgement checks before you start
Check your business name, ABN, trading name, and the accounting basis you use, because mismatches can lead to rework. If your figures come bas lodgement from multiple sources such as invoices, POS reports, and bank feeds, reconcile them first to avoid carrying errors into your BAS. This step also helps you identify missing documents early, rather than during preparation.
Next, gather the core records that drive GST and reporting outcomes. Include sales summaries, purchase invoices, expense claims, and any adjustments such as credit notes or refunds. If you use a bookkeeping system or spreadsheets, verify that GST is being coded consistently across transactions. Where there are mixed supplies, review the classification carefully so the correct GST treatment is applied to each line item.
GST and data verification you should not skip
Use a checklist to validate GST totals against your bookkeeping reports. Confirm that total sales and taxable sales align with your sales register, and that GST collected matches the GST on sales. For purchases, ensure that GST credits are supported Online Small Business Bookkeeping Services Perth by valid tax invoices and that input tax credits are claimed only when eligible. If you have exemptions or reduced credit situations, check the coding rules and confirm the totals reflect those outcomes.
Then review adjustments that often trigger differences between bookkeeping and BAS figures. These include bad debts, amendments, reclassifications, and timing issues such as invoices issued but not yet paid. If you have employees’ expenses, mixed-use costs, or fuel claims, confirm that any GST components are treated consistently with your records. A careful review at this stage reduces the chance of amendments, late corrections, or ATO compliance concerns.
Submission readiness and common problem prevention
Before you submit, confirm that your numbers are complete and internally consistent. Cross-check your BAS totals with the trial balance or GST report totals, and confirm that your balance dates tie back to your bookkeeping settings. If you’ve made manual journal entries, ensure they are properly referenced and supported. You should also verify that any PAYG withholding or instalment components are included where applicable to your business structure.
It’s also smart to check for practical submission readiness items that can cause delays. Ensure your authorisation details, contact information, and lodgement method are correct so the submission process is smooth. If multiple people contribute to your bookkeeping, confirm that the latest version of the figures is the one being used.
Conclusion
By verifying GST totals, reconciling source documents, and checking submission readiness, you reduce the risk of rework and avoidable compliance issues. Professional support can also streamline the process by ensuring the bookkeeping data used for your BAS is timely and properly structured. Books & Balance helps small businesses stay compliant with ATO requirements through reliable bookkeeping support and efficient BAS preparation and lodgement. If you’re balancing workloads and want certainty around accuracy, use the checklist approach as a repeatable system. Keep your records consistent, document your adjustments, and confirm totals against your internal reports before any submission. With a clear process, you can turn BAS time into a manageable task rather than a stressful scramble. When you’re ready, Books & Balance can support your business with dependable, compliance-focused preparation. Visit Books & Balance for more details.
