Hi there, Kcs8.
Nice to have you here in the Community. I'm here with some insight to provide on your question regarding changing the tabs on the toolbar.
I can see how adding a personal touch to the toolbar can help you easily navigate through QuickBooks. While we don't have this option, I'm going to submit a feature request on my side, which is sent to the Product Development Team for review.
They're constantly looking for great ideas from users, like yourself, when deciding how to enhance QuickBooks Online.
Keep in touch if there's anything else I can do for you, in the meantime. I'm always here to provide help and answer any questions that you may have. Wishing you a lovely day!
Thanks for joining the conversation, @dmphelanlpc.
The feature request page is no longer available. However, I'm taking note of your ideas and passing it along to our developers for consideration in the near future.
Having the option to set your own preferences can be beneficial to others. I’ll let you know if there are any changes by updating this thread.
In the meantime, you can check the newly added features of QuickBooks Desktop on this article: What new in QuickBooks Desktop for Mac 2019.
I’m only a few clicks away if you need anything else. Wishing you the best!
Thanks for joining the thread, @debbiew19.
Able to customize the color for your estimate and invoice tab is currently unavailable. However, you can customize your form templates using the Layout Designer and set color alternate rows on invoices.
For more details about this, see these article:
Here's also some resource for more information about creating invoice and estimate which you may find helpful in the future:
Additionally, to know about the new and improved features in QuickBooks, take a look at this link: What's new in QuickBooks Desktop for Mac 2021.
Please let me know if you have any other questions. I wish you and your business continued success. Take care.