When you invoice from an opportunity with deal pricing, the invoice created is slightly different to an invoice created otherwise.

When you choose to group by item, an invoice item will be created for each tax class in a deal. You’ll see “Deal Price” in red next to this label. Items within the deal will be listed underneath this item for reference. 

Invoice items will be created as normal for opportunity items that are not within a deal.

When you choose to group by opportunity group, an invoice item will be created for each tax class in a deal. The groups that have this tax class will be listed underneath this item.

Invoice items will be created as normal for opportunity groups that are not within a deal.

You can’t group an invoice by product group when using deal pricing.

When you choose to group by opportunity, an invoice item will be created for each tax class as normal. These lines include deal and non-deal priced revenue.

A line isn’t created for each revenue group.