How do I add my own statement Number and not have the automated QB generated Statement number. How can this be changed?

I understand how customizing customer statement's number is beneficial to you and your business, @robyn19.

At this time, we're unable to modify the customer statement's number in QuickBooks Online. Meanwhile, you can utilize an integrated third-party app in QuickBooks Online. QBO does offer the support of thousands of various third-party applications for any functionality you may need. To look for an app that can help you accomplish this, head to the Intuit App center and type a keyword like "statement" in the search-bar.

You can follow these steps:

1. On the left panel, click Apps.
2. Go to the Find Apps tab.
3. Use the search bar to look for an app.
   

Refer to these articles for more info: 

• Install and use apps.
• Apps that work with QuickBooks

For future reference, the following articles outline the steps on how to personalize the look on your forms:

• Create and view customer statements
• Customize invoices, estimates, and sales receipts

Lastly, I'd like to let you know that our developers are constantly uncovering and considering new ways to improve the program. To be updated with our latest news and enhancements, you can visit our QuickBooks Online Blog.

Stay in touch if you have any other questions or concerns. I’ll be right here to answer them for you. Enjoy the rest of the day.