How can I show a profit/loss statement for Oct. 2019-Oct.2020?

Hello there, @frauendorferunli.

I'd be glad to show you how to customize the date of your Profit and Loss Statement in QuickBooks Self-Employed (QBSE).

The Profit and Loss Statement in QuickBooks is called the Profit and Loss Report. Here's how to set up the date range:

1. Go to the Reports menu.
2. Select the drop-down button in the Profit and Loss section and choose Custom Date.
3. Enter the date range in the boxes and select Apply. This is how it looks like:
   
   

I've added this article that may help you with your related tasks in the future: QuickBooks Self-Employed Overview. This contains topics such as "How to track deductions" or "What schedule C categories are in QBSE?"

Please don't hesitate to tag my name in the comment section if you need further assistance. Take care and have a wonderful day ahead.