In Switzerland we have a the possibility to choose a flat VAT regime which means that you have to pay a reduced flat tax rate on all sales but you can't deduct the purchase tax.

Example:

According to my industry, I have a flat VAT rate of 6.1%. I have to invoice my customers at  the regular rate of 8%, but I do have to pay to the tax authority 6.1% only.

My setup:

Account VAT to pay: 2200 (Account payable account)

Account Purchase VAT: 3900 (Expense account)

Tax definitions:

- Tax Group: Flat Sales Tax 6.1%

- Tax Item 1: Sales VAT 8.0% (Percentage, Account 2200) -> must be visible and computed on sales invoices

- Tax Item 2: Flat Tax Correction -1.9% (Account 3900/Account 2200) -> must not be visible and not be computed on sales invoices, it should directly post to the financial accounts only.

Is this possible using python tax, and if yes, how would I do it? Or any other ideas?