Invoice
Deletes specific line items from an invoice and releases any timesheets, expenses or fixed amounts linked to them back to uninvoiced. Unlike PUT /api/Invoice (which replaces the whole line item collection), this endpoint only touches the line items you name. The invoice must not be Void and must retain at least one line item; totals, balance and status are recalculated.
post/api/Invoice/RemoveLineItems
Request body
Response
Returns the updated invoice and the IDs of the released source records.