Some user may encounter double tax issue when using Xin Invoice. This is due to the previous setting when trying to play around with the system. To solve the problem.
2. Change the Taxation Method to Double Taxation.
3. Click on Save button.
4. Go to inventory
5. Go into inventory details that have double tax issue.
6. Check on the double tax column to see whether it's have value. Change to :::select::: if have value.
7. Try to recreate the invoice again.
Please refer to below print screen for better explanation,