Change Tax Number label for GST on Invoice

Good evening, alpha25. 

Thanks for reaching out to us here. I'd be happy to provide some information.

At this time, there isn't the option to change this label in QuickBooks. I can see how being able to do this would be beneficial for you, So I recommend leaving feedback for our developers by heading to the "Gear" icon and clicking on the "Feedback" option. This feedback is viewed and considered when creating new features and updates for QuickBooks.

Feel free to reach back out if you have any further questions.