core8 field nameLabelcore8hubspotsalesforcepipedrivequickbooksstripegreenInvoice
Object NameinvoiceLine(none)(none)-part of Linepart of linespart of document.items
productIdProductproductId---SalesItemLineDetail.ItemRef.value(1)references “price/product”line “item id” or reference
quantityUnitsquantity---SalesItemLineDetail.Qtyquantityquantity
unitPriceUnit PriceunitPrice---SalesItemLineDetail.UnitPriceinside line “unit_amount” or “price”price
discountRateDiscount %discountRate---separate DiscountLineDetail or partialpartial (coupons, adjustments)partial discount lines?
discountAmtDiscount AmtdiscountAmt---same note as discountRatesame notesame note
currency(inherited)currency---from invoice currencyfrom invoice currencyfrom doc or partial
amountAmountamount---LineAmtline-sum or partial logicline “total” or partial
billingFrequency(none)billingFrequency----- (Stripe invoice lines don’t typically store freq)-
dealLineId(internal link)dealLineId------
serviceStartDate(none)serviceStartDate---SalesItemLineDetail.ServiceDate? (maybe)--
serviceEndDate(none)serviceEndDate---no direct in QBO(2)--

(1) The QuickBooks line references product with ItemRef.value.
(2) Possibly requires custom extension or separate approach.