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# Australia ABN Shopify - How to add ABN on Shopify Australia

If your company is GST registered in Australia, you should include your ABN (Australian Business Number) on every invoice you create.

To set the ABN of your company:

1. In your PDF Invoice - Order Printer account, go to the **Preferences** → **Store Details.**
2. Type in your ABN number in the **Registration Number** field.
3. Click Save