How to create customer advance against Invoice.


I have one scenario.

Unit Price = 2,25000

B.E.D = 18000

Cess = 540

Vat 2% = 4871

Advance Payment = 70,000.

Balance = 178411.

I created Sales Order , then Down Payment Invoice . In DPM i enter 70000 or 31.1% then it shows Balance Due = 90310, Tax 20310. which is wrong i think.

But if i enter DPM = 100% and then click on Payment Means & enter 70,000 then it shows Balance Due = 178411. But when i create A/R Invoice then it gives message "One or more down payments that are linked to base documents have not been paid.

What step i am missing in this case.

Last i want to know what is DPM in A/R Down Payment Invoice. Is this is used for entering advance payment.

Thanks in Advance.