Cause
The VAT codes table is missing in the English file defined for Switzerland, or the VAT codes are missing for the net tax debt rate/flat rate method.
Solution
The VAT codes with the prevailing tax rates in Switzerland must be inserted in the VAT codes table. You may copy and paste the VAT codes table from an existing Banana Account Software template or, from the same example file, import VAT codes for Switzerland via the import command in the Account1 menu.
Refer to Swiss VAT tax report - Flat tax rate method for further information.