Hi wilsonao!

Let me clarify the purpose of the T.

The purpose of the T is to tell your customers which items are subject to tax. Example: If you invoice them 4 items, and 4 of which are taxable, at least they will have an idea that the tax amount was calculated based on the items with a taxable (T) indicator. For this reason, we're unable to remove it from the invoices in QuickBooks Online.

To avoid confusion, you can add a note to your customer's first invoice about the T. Educating them about their invoices is also a way to build a positive relationship.

Feel free to reach out if you have other questions.

Have a good day and more power to your business!