Hello, Steve.

At Intuit, our goal is to meet the needs of QuickBooks users around the world and provide the best experience possible.

If you’re asking about adding a subtotal line to the invoice, I’m pleased to let you know that this feature is now available in the new invoice format. Simply click the drop-down arrow next to Add product or service and choose Add subtotal.

However, if you mean something else, can you please provide additional details about the standard feature you're looking for to be available into the online version? Any additional information would be greatly appreciated.

For your future reference, you can find comprehensive guidance on recording invoice payments in this article: Record invoice payments in QuickBooks Online.
 

Feel free to reach out if there’s anything else I can assist you with, Steve. I'm here to help!