In my invoice selection I accidentally entered “sales” and I meant to enter “services”. How do I change that in categories in my account?

Thank you for being a part of the Community. Allow me to assist you in changing an invoice from sales to services.

If what you're referring to is you've mistakenly entered the wrong item in the invoice, we can edit it in the Sales tab.

 Here's how:

1. Go to the Sales tab, then select Invoices.
2. Choose the Invoice you've made, then click Edit. 
3. Change the Product/Service, then click Save. 

On the other hand, if you've accidentally changed the account item, we can perform the steps I've provided below:

1. Navigate to Sales, then go to Products and Services. 
2. Scroll down, then locate the item you've made. 
3. Once you've located it, click Edit.
4. Change the product to Services, then click Save.

Moreover, I've added this article to help you personalize your invoices: Customize invoices, estimates, and sales receipts in QuickBooks Online.

Furthermore, you can check out this article to learn how to run basic reports: Run reports in QuickBooks Online.

Please let me know if you need further assistance with your invoice or have any QuickBooks-related queries. Stay safe.