For a few days now I have been trying to edit a customers address and it does not allow me to edit anything? Click on edit customer info and it just blinks?

There's an ongoing investigation about being unable to edit the customer information under Invoices, @asmithplumbingco. I'll route you to the department that can help us sort this out.

You can contact our support team to be added to the list of affected users. A notification will be sent via email once the fix is available. Ensure to check our support hours so you can contact us conveniently. I'll show you how:

1. Go to the Help icon at the right corner.

2. Select the Contact Us button.

3. Enter your concern, then press Continue.

I'm adding this article for more ways of sending invoices: Create invoices in QuickBooks Self-Employed. 

Here's more info on Schedule C categories: Schedule C and expense categories in QuickBooks Self-Employed.

Know that our Team is working hard to resolve this issue quickly. It'll be my pleasure to aid you with any other QuickBooks tasks you may have. Take care.