i have a query on how to maintain the number ranges for the following scenario
my requirement is: my plant will sell materials to three type of customers.
1. the customer who is vat registered and who can take modvat
2. the customer who is not vat registerd and he can not take modvat
3. other state customer i.e. CST customer.
my question is when ever the plant is selling to the above cutomers it should use different number ranges for different customer category.
can any one please tell me how and where to maintain the number ranges for different customer segments for excise invoices.