Where four registers stop agreeing
A sale gets billed and written in the udhaar register. A payment gets noted in the cash diary and maybe against the party. A purchase invoice goes in the file and the stock is adjusted from memory. Every one of those is a second entry that somebody has to remember, and the day it is skipped the records begin to drift. By the time the CA asks for figures at year end, reconciling them is guesswork. In one system a credit sale is a bill, a ledger entry and a stock movement at the same moment, because it is the same event.
What you can actually see day to day
The day's sales by cash, UPI and credit. What is in the drawer against what should be. Who owes you and for how long. What stock moved and what is running out. Which purchase bills are unpaid. None of it requires running a report, because it is the dashboard — the point of doing the entries properly is that the answers are already there rather than being reconstructed on a Sunday.
Year end without a scramble
When everything has been recorded as it happened, closing the year is producing figures rather than assembling them: sales, purchases, closing stock at landed cost, party-wise receivables and supplier-wise payables, and GST already summarised month by month. Your CA gets data instead of a carton of paper, which usually costs less as well as taking less time. The shops that find year end painful are the ones that kept four registers.
In Hindi, for staff who kept the register
The person who has kept your udhaar register for ten years is the person who has to use this. The interface is in Hindi, their login can be limited to exactly what they should touch, and the layout follows a working day rather than an accounting textbook. There are no debits and credits to learn — the accounting comes out at the other end for the CA, which is where it belongs.