Welcome to the Community. I have some information regarding QuickBooks Online's capability.
Tax collected at Source (TCS) is calculated based from the Sales value or (Scrap Value + GST). Currently, an option to automatically calculateTax collected at Source (TCS) is unavailable.
Since this is not supported in QuickBooks, I recommend seeking expert advice from an accountant. They'll be able to provide you with an alternative way to record TCS in the system.
Though, it would be beneficial to calculate TCS automatically in the program, too. Our engineers might be working to bring this feature over to this platform in the future.
As we assess this, I suggest you visit our QuickBooks Resource Center for tips and guides related to QuickBooks.
I've also attached an article you can use to help you add tax categories to items, as well as how to track tax from your customers in QuickBooks: Set up and use tax in QuickBooks Online.
Feel free to hit that Reply button if you have additional questions about adding TCS. Have a great day ahead.
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