How to code a purchase invoice with mixed GST lines in Business Central

A mixed GST bill has some lines with GST and some without, such as taxable goods plus GST-free items. Each line needs its own GST code.

Before you start

• Enable GST (Australia) turned on in General Ledger Setup
• VAT Posting Setup done

The Business Central way

Where to find it: VAT Posting Setup and Purchase Invoices > Lines

1. In VAT Posting Setup create each combination of VAT Bus. Posting Group and VAT Prod. Posting Group with the GST rate and purchase VAT account.
2. Give each line the right VAT Prod. Posting Group, for example 10% GST or GST-free.
3. Check the GST totals and post.

Limits in Business Central

• If the document total check is on and lines have different GST rates, you must key the GST amount yourself.

Good to know in Business Central

• Set up GST posting before you run the BAS report.

The Pulsify way

1. Forward the supplier's invoice to your Pulsify address or upload it. Pulsify reads every line and finds the vendor in Business Central.
2. Pulsify works out the GST rate for each line from what is printed and picks the matching VAT posting group (GST) in Business Central.
3. Check any line where the invoice is unclear. Change the VAT posting group (GST) and approve.
4. The purchase invoice is created in Business Central with the GST on each line.

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

What Pulsify does not do here

• If the invoice does not show GST by line, Pulsify uses past bills for that vendor. Check those lines yourself.

Common mistakes

• Setting up GST posting after the BAS is due. Set it up before you run the BAS report.
• Leaving the standard rate on a GST-free line because the VAT Prod. Posting Group was not changed.

More help

• How to code an AP bill with mixed GST lines in Acumatica
• How to code a purchase invoice with mixed VAT rates in Sage 200
• How to code a vendor invoice with mixed GST lines in Sage 300
• How to enter a purchase invoice with line items in Business Central
• How to check GST coding on purchase invoice records in Business Central before you lodge your BAS
• How to code one purchase invoice to several G/L account codes in Business Central
• All Business Central how-to guides
• Pulsify setup guides

Sources

Last checked 2026-10-19. Confidence: confirmed.

• learn.microsoft.com/en-us/dynamics365/business-central/localfunctionality/australia/how-to-set-up-goods-and-service-tax-posting
• learn.microsoft.com/en-us/dynamics365/business-central/check-purchase-amounts
• learn.microsoft.com/en-us/dynamics365/business-central/localfunctionality/australia/how-to-set-up-business-units-for-business-activity-statements