Is it possible to change the status of an invoice? I marked one paid by mistake.

You've posted in the right forum, @cowens029987. Currently, the option to change the status of a paid invoice isn't available in QuickBooks Self-Employed.

As a workaround, you can note the details of the invoice. Then, delete and recreate it. Here's how:

1. On the left navigation, select Invoices.
2. Below the Invoices page, look for the invoice transaction we'll delete.
3. Click the dropdown icon under the Action column. Then, pick Delete.

I'll also include this article if you want to learn how to assign categories to your transactions: Categorize transactions in QuickBooks Self-Employed.

We'd be glad to have you back in the Community if you have any other invoice transaction-related concerns. Just click the Reply button, and we'll be ready to help you.