I have customer he is also my supplier as well. I have account payable for this customer as well as account receivable. whenever i sell something to this supplier than amount in account payable is not reducing. How can it can be linked. and also sale and purchase in report is not available how can i get sale and purchase in one report for this customer cum supplier.
Have your read the Guide at http://guides.manager.io/businesses/customers/contra-entries? That should take acre of the offsetting payables and receivables. I don’t think there is a way to get a combined report except through custom reports.
You need to create your customer as a supplier in the supplier Tab if they sell things to you.