It's a feature that allows you to control the price of your products and services, Lucy. We'll provide more information below and help you remove the pop-up you encounter when entering an invoice in QuickBooks Online (QBO).
In QBO, you can offer discounts or charge different rates based on where the employee performed the work using the price rules feature. However, please note that this option is currently unavailable in the UK region or version of the program. For more details, you can visit this US-based article: Set price rules in QuickBooks Online.
Also, I'd like to ask about the pop-up that appears when creating an invoice. Are you referring to accepting credit card payments? If it's your first time entering an invoice, prompts about accepting credit card payments from customers will appear on the invoice page. Once you've set it up, it'll no longer appear on your invoice screen.
Moreover, here's an article to help you manage invoice payments and create personalised sales forms in QBO:
Please continue to utilize the comment section below for a prompt response. Rest assured, we're here to provide further assistance in resolving your QuickBooks-related concerns or help you handle customer invoices in the program.