Click on “+ New Product” at the bottom of the screen.
Select the Type as either product or service and fill in the basic details like product Name, selling price, and tax percentage.
(You can also add units of measurement, HSN / SAC Code, purchase prices, category, etc.)
Click on the drop down button at the end of the optional fields column.
Now, Select the Barcode option and scan the barcode or add the number to assign a barcode to the product.
(If applicable, you can also add opening stock details, discount percentage, Cess percentage, etc.)
Now, Click on the “Add Product.” button at the bottom of the screen to add the product.
Congratulations! You have successfully added a product with a barcode to your product list. A pop up will appear on the screen informing the same.
From now on, you can use this product whenever you create a new transaction.
Also learn How to generate a barcode for the product on Web
How to add an image to a product on Android