How can I add columns to my custom profit & loss statement?

Hello wilda-thumm, 

Glad to have you join the Community. QuickBooks offers a variety of reports that help you streamline your work with ease. I'm glad to learn you're using the Profit and Loss report to bring your finances into perspective.

In order to successfully customize your reports, I recommend checking out the following article that shows you how to: Customize reports in QuickBooks Online. The article shows you how to select the columns you'd like to see on your report. In case you're experiencing browser-related issues, I suggest clearing cache and cookies. Clearing cache and cookies is a great way to clean your browser allowing it to work more efficiently. Here's an article that shows you how to do that: How to clear cache and cookies.

Let me know if this info helps. I'll be one message away in case you additional further assistance.