# How to check GST coding on purchase invoice records in Business Central before you lodge your BAS

In Business Central, run the GST report by VAT posting group (GST) for the period. Review large bills, new suppliers and freight, fix wrong VAT posting group (GST) entries and check you hold a tax invoice for each credit.

A pre-BAS GST check means reviewing bills for wrong tax codes, missing tax invoices and suppliers not registered for GST before you claim credits.

## Before you start

- GST set up

## The Business Central way

Where to find it: BAS Return Periods and Check Doc. Total Amounts

1. Keep Check Doc. Total Amounts on so the GST total is keyed and checked.
2. Check the VAT Posting Setup lines.
3. Open the BAS Return Period and use Suggest Lines to see GST entries before you release.

## Limits in Business Central

- No exception report for wrong GST codes was found.

## The Pulsify way

1. Forward bills to Pulsify through the period.
2. Pulsify sets a GST code on each line from the rate printed on that line.
3. Pulsify flags a supplier ABN that is not registered for GST when GST is charged.
4. Review flags before approval, so fewer errors reach Business Central.

Pulsify connects to Business Central. We set up the connection for you.

What Pulsify does not do here:

- Pulsify does not lodge or prepare your BAS.
- It does not check bills already in Business Central.

## Common mistakes

- Turning off Check Doc. Total Amounts, so GST totals are not keyed and checked.
- Releasing the BAS return before reviewing the Suggest Lines result.

## Common questions

### How do I preview GST before the BAS?

Open the BAS Return Period and use Suggest Lines to see GST entries before you release.

### What does Check Doc. Total Amounts do?

Keep it on so the GST total is keyed and checked.

### Is there an exception report for wrong GST codes?

None was found. Check the VAT Posting Setup lines.

### Does Pulsify prepare my BAS?

No. It helps get bills coded correctly.

## Sources

- https://learn.microsoft.com/en-us/dynamics365/business-central/check-purchase-amounts
- https://learn.microsoft.com/en-us/dynamics365/business-central/localfunctionality/australia/how-to-print-goods-and-service-tax-settlement-reports

Source: https://www.pulsify.tech/how-to/check-gst-coding-before-bas-in-business-central/ (last checked 2026-10-19)