Reopening a quarter – trade goods for services – impact on declarations?

Reopening is possible: Dexxter: Settings->General->Reopen quarter

You must open all quarters up to the quarter in question.You can then edit the category of the relevant invoices and close quarter back.

Thanks for the printout tip! I hadn't thought of that myself.

In the meantime, I have been in contact with the government/vAT administration by telephone and would like to add something else.
Among other things, if a quarter is reopened and edited, you have to upload everything on Intervat. (If I remember correctly, the vAT had to be recalculated.) Also, rebooking a Good (trade goods) to services causes it to change in the accounting grid. This is if it is just a simple rebooking of an item; for more serious corrections, you will either have to pay additional vAT (or receive a larger refund).