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In QuickBooks Online, we can create a discount item and add it to the bundle. However, we still need to enter the negative amount under the Rate column when creating a transaction, @chas2.
To create discount items, here's how:
Another workaround, you can put the Discount directly to your invoice created by choosing either Discount percent or Discount value.
For helpful article about how to Change Product and Service items to identify and classify the items and services.
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