QB Issue Resolution:

The briefcase you mentioned is a feature available in QuickBooks Online Accountant.

You can delete the expense transaction and recreate it as sales. You’ll want to add the supplier as a customer first. Note: you can’t use the exact same name of the supplier. You’d want to add a little distinction.

  1. Click Sales on the left pane.
  2. Select Customers.
  3. Select New Customer.
  4. Enter your customer’s info.
  5. Select Save.

You can check this article on how to create an invoice: https://community.intuit.com/articles/1769984.

Resolution for Issue 'How do I change a supplier form Expenses to Sales I looked online and it said go to company and select the briefcase but I cannot find that ?' available: Yes (Solved).
Source: Intuit Community forum.

How do I change a supplier form Expenses to Sales I looked online and it said go to company and select the briefcase but I cannot find that ?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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