No. There is no way to compare data from two different businesses in Manager.
As far as Manager knows, all the receipts in your screen shots are being created the same day as the corresponding sales invoices. In fact, you cannot receive money against a non-existent sales invoice. So this is not your problem.
@Joe91 is correct. You must find the source of the 5,240 PKR. As I wrote earlier, a new start on your accounting records will be useless until you correct the old ones. And then you won’t need a new start. I also repeat my earlier advice: issuing sales invoices for walk-in customers who are not identified seems pointless. Just create a receipt directly.
You need to show edit screen of the invoice in question but I would be pretty certain that the invoice was modified by someone rather than the programme
You haven’t said which version you are using - I assume that it is the Desktop version. This is a single user version as there are no controls on access. How can you be sure no one has changed the amount?
No, there is no version or other history in the desktop version
What happens if you import a copy of the business again? is the invoice changed again? if not, then it points to a manual change but there is no way to prove this one way or another
Let me make three more observations after reading the recent posts and reviewing their screen shots:
The difference discovered so far is only for 2950.00, not the 5240.00 previously discussed. So there is another entry issue that has not yet been found.
@toijaz’s most recent screen shots clearly show that between versions, the complete line item for DAN-P1700 was added to sales invoice #6807. There is absolutely no possible way for this line item to have been added by the program or because of a software update. On the desktop edition, this can only have happened because @toijaz made the addition.
The difference of 2950.00 does not match the amount for the added line of 1500.00. That suggests there might be two invoices with the same number somewhere in the file.
@toijaz, this has been said before. You must stop using multiple versions of the program. The fact that you can produce screen shots from both proves they are both active and somehow calling different versions of the business data file. You need to figure out which is correct and get rid of other versions. Your problem was not caused by a software update.