Thank you for visiting us here. Modifying the Subtotal, and Total for taxes is an effective method for tracking taxes. I can lay some details regarding the customizing option under the tax totals on your sales forms in QuickBooks Online.
Customizing the tax totals in the Invoice section certainly provides users a clear view of their inclusive and exclusive taxes. However, it's not feasible in QuickBooks Online since these tabs are default-designed system features.
For additional information and to explore customization options for your sales forms, you can visit this page. It provides a comprehensive list of available settings that you can adjust to better suit your business needs: Customise invoices, quotes, and sales receipts in QuickBooks Online.
I'm also attaching these resources that will help you handle your invoices in the future:
The Community forum is always available to assist with custom form style topics. You can reach out to us below, and we will respond as soon as possible.
