Set accounting date based on the effective date of related shipments

[pokoli (Sergi Almacellas Abellana)]

This has been already explained in the linked topic:

@sergyo

@albert

@sergyo

today 15th January issue and invoice with invoice_date today (15th January) and accounting_date 30th December.

How will you manage the SII declaration in this scenario?

PeriodoLiquidacion: { Ejercicio: 2021, Periodo: 12}
FechaExpedicionFacturaEmisor: 15/01/2022
FechaRegContable: 30/12/2021
FechaOperacion: 30/12/2021

The fact is that the company delivers some goods at 30/12/2021 but we do not issue the invoice until 15/01/2021. So the user needs to set the accounting date to 30/12/2021 as the Spanish law requires that the taxes should be declared when the goods are set (which is before the invoices is posted), so the move should be booked at this date.

So my proposal is about setting the accounting date automatically as tryton already knows when the goods are sent instead of forcing the user to set them manually.