Welcome to the QuickBooks Community, drzewieckikimber!
You've come into the right place to get help with closing your books. I'm glad to share information about it.
To do this, we just need to do a few clicks in your settings. I can write them here, but I think it's better if you refer to this article: Close your books in QuickBooks Online. Aside from the detailed steps, it also includes a video clip to guide you through closing your books.
Let me know if you have questions as you follow the instructions in the article. I just wanna make sure that you're able to successfully close your books.