Hello friends. There is a feature in the tax system in my country that I cannot discover in the program. Some service items are calculated 30% over the tax of 20% and the tax is reflected. How can I do this? For example, 10.000 Tl / 20% = 2000 Tl. 2000 / 30% = 600 Tl
You need to provide a little more detail about your issue.
But looks like you issue could be solved by using 6% of total amount which is equal to 30% of 20% and will give you similar results to your given example.