t would be really nice if you can get PnL by invoice or Pnl by product item. At this time, new QuickBooks Online Plus can not provide with such financial report. No such reports are available even though certain cost exist data may already in the QBO file.
If you are selling inventory items and costs are fixed (not variable costs), you can create sub-customer per invoice and may be able to get the PnL by Invoice. Again, I am stretching a little bit here since today’s QBO is designed for job cost, product cost or whatever costing method you want to use.
For non-inventory selling business or servie type selling business, no can do in today’s QBO.