Since the autumn version 2022, there has been the ‘vat date’ field, which - as the name suggests - controls the date or period in which the sales tax or input tax is taken into account. The field can be pre-assigned with either the posting or document date via ‘General Ledger Setup'.

A distinction between purchase and sales would be useful here.

On the sale side, the posting date is generally the correct choice for the vat date.

On the purchase side, the document date will generally be the correct choice for the vat date.

I therefore suggest that the pre-assignment in the organisation be differentiated between purchse documents and sale documents.