Is it possible to move all of the company information on the modern estimate form up so there is more room for line items? Tabs or stops are there but do not move.

Congratulations on your successful migration to QuickBooks Online (QBO), Leslie.

If you'd like to update the name, address and other company information displayed on your estimate, you can easily do this in the Company info section. Any changes you make there will automatically reflect on your sales form.

To update the data, follow the steps below:

1. Go to the Gear icon and select Account and settings.
2. In the Company tab, click Edit to make any changes. 
   
3. Click Save and Done.
    

Also, If you want to add multiple line items on the form, you can click the six-dot column before the line number to move to the next line instead of using the Tab key. I've added a screenshot for your visual reference:

Lastly, while the ability to remove the Tax column is unavailable, there are other details you can customize to appear on your estimate. You can click the Manage icon and select Customize. I've attached this for you:

 

On top of that, discover how to design personalized, professional-looking sales forms in QuickBooks Online (QBO) to leave a lasting impression on your customers. I've added this article for you: Customize Invoices, Estimates, and Sales receipts in QuickBooks Online.

Did you know that our QuickBooks Live Expert-Assisted team is available on demand to help you optimize your sales and expense transactions and reports? With their support, you can gain clear insights into how your business is performing at any time. Explore this service today!

If there's anything else you'd like clarified about how your estimates appears or if you're referring to something else, feel free to let me know. I'm always here to assist every step of the way.