Hi there Munir uddin,
It's important that all your transactions be entered correctly for your books to be well-balanced. QuickBooks Desktop is a great tool able to help you keep track of sales and expenses so you know the profit of your company. I can point you in the right direction for assistance with entering these sales.
To know what accounts to use for your journal entry, and which ones should be credited and debited, I recommend speaking to your accountant. Their expertise will be able to assist in making sure all your transactions affect your books correctly. You can find an accountant near you by going to our Find an Accountant page.
If you have any other questions, feel free to reach out here.