If i want to give commission of sales invoices is there any way that i can book commission while issuing the sales invoice??
You could add two lines to the invoice with the sales commission - one to post it to an expense account and another to post it to a salesman’s liability account but it appear on the invoice and the customer would be able to see it - so probably not a good idea
You can add a line item, but you would be showing the customer you are charging them for the commission you will pay to someone else. To remain within the agreed price, you will have to lower the unit price of whatever you sold.