Thanks for visiting us here, DJ_MTT. 

I've got details and steps to help you edit the invoice amounts linked to your estimates.

Since these estimates are converted to invoices, you'll first need to delete the created invoice and modify the amount or other details from the estimate. Then, recreate the invoice.

To delete the created invoice, here's how:

1. Go to Sales from the left menu bar and click Customers. 
2. Select the customer's name and open the invoice.
3. Click More at the bottom of the invoice and choose Delete.
4. Then, select Yes to confirm.

Once done, let's re-create the invoice from the estimate. Please ensure that all specific details entered are accurate. 

To edit the estimate, refer to these steps:

1. In the Transaction List under the Customers tab, select the estimate.
2. Edit any changes and review its details.
3. Once done, click Save and close.

You can also check out this article for more detailed information: Void or delete transactions in QuickBooks Online.

Moreover, you can browse these references to guide you in customizing and adding specific information to your sales forms: Customize invoices, estimates, and sales receipts in QuickBooks Online.

You can always return to us if you have additional questions about managing your sales transactions. We'd gladly assist you at any time. Keep safe and have a good one!