Invoice a quotation in instalments

A quotation became an invoice, once, for all of it. That is right for goods and wrong for work: a six-month job billed on the last day is six months of somebody else’s costs carried on your overdraft.

The tracking already here counts quantities: half the boxes now, half in March. It cannot express a third of a fixed-price job, where there is one line, one unit and three payments.

Nothing changes until you switch it on. Quotations already converted keep their status and their invoices.

One related change applies either way: an accepted quotation can no longer be edited by default, because what the customer agreed to is what it says. Revise it instead, or allow it in the same settings card, in which case editing leaves the status alone.