What is separate and what is shared
Stock, billing and the day-end cash position are per branch, because those are genuinely different things. Parties are shared, so a contractor who buys from whichever shop is nearer his site has one ledger rather than two — which prevents the common problem of a customer being over-extended because neither branch could see what the other had given him. Items are shared too, with quantities held per location.
Staff boundaries
A login is tied to a branch and to the permissions you tick. A counter assistant at the second shop sees only that shop's billing and never your purchase rates or the other branch's figures. A manager can be given a whole branch including stock and outstanding while still not seeing the other. That separation is what makes staff logins safe to hand out at all.
Transfers between locations
Material moves between branches constantly, and a transfer recorded as a transfer keeps both figures honest and leaves a trail. Adjusting one branch down and the other up by hand is how discrepancies start. Where the movement crosses the e-way bill threshold — which a truckload of cement will — the transfer carries the values and vehicle details the portal asks for, because a stock transfer needs an e-way bill just as a sale does.
The owner view
Total sales, total outstanding, stock across all locations, and branch against branch comparison, in one place. Nobody adds two spreadsheets together at month end and there is no period where the combined figure exists only in your head. It also makes an underperforming branch visible early rather than at year end.
When a second branch is worth it
The figure that decides it is not sales, it is what a branch does to your working capital. A second location duplicates stock, adds staff and usually extends more credit, so it consumes cash for months before it returns any. Branch-wise reporting shows that plainly: sales per branch alongside outstanding per branch and stock value per branch. A branch turning over well while its outstanding and its stock both climb is not yet profitable, and knowing that six months in is considerably better than knowing it at year end.