Hi, how to add customs duty in quick book.

Thanks for posting here, aleem_rahman.

We can create an expense account called Custom duty or whatever you want to name it. Please follow these steps:

1. Go to the Accounting tab and select Chart of Accounts.
2. Click the New button and select an Account Type and Detail Type.
3. Name this account as Custom Duty then click Save and Close.

Then, you can record an expense transaction using that expense account. 

Please post again here if you have more questions. Stay safe!