One of my client doing computer selling business. For him process is raising invoice in tally when they made sales, but in purchase there is some issues, they are up dealers, they get materials 100℅ but they have to repay to hP for 4installement. So invoice getting quarterly. In is tally facing issues in profit and loss account. Example sales is 100. Purchase is 40. Sales is 100 but purchase get invoice 10.profit is showing 90. But correct one is 60.
Please tell me how to maintain the correct profit and loss account in tally.