I’m experiencing similar issues.
I’ve recommended this for our clients and got it installed. But when we are recording an expense, invoice doesn’t show the tax break up at all. Here is what I did. Let me know if m missing something.
1. Created a Sales Tax called TDS in India which is 10% in ERP > Accounting > Sales Tax
2. Under Expenses tried to record a new expense and selected TDS.
3. It doesn’t show the tax calculation and instead records the overall cost.