Under Settings > Accounting > Currency rounding of the currency CHF in the customer documents can be adjusted. The set rounding applies to quotes, orders, credit notes as well as invoices.
If rounding is deactivated (see picture below), the amounts in the customer documents will be rounded to the nearest 0.01 CHF. If rounding is activated, the amounts will be rounded up or down to 5 Rappen.
This setting is only possible for the currency CHF and does not apply to imported customer documents, which are always processed with rounding 0.01.