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You can review the format of the invoice you're currently using. From here, you'll be able to customize the headings or labels used in every column.
You can refer to this article for more detailed steps: Customize invoices, estimates, and sales receipts in QuickBooks Online.
In addition, you can use and import your own invoice design into QuickBooks. You can read through this article to learn more about it: Import custom form styles for invoices or estimates.
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