Hello, Shariekp.

Thanks for chiming in and for attempting what my colleague provided. I would gladly lay down some details on how we can create and review an invoice and send it at the end of the day. 

As you've noticed, a recurring invoice template only applies to a single customer. However, we can create a single template, then use it when creating the invoice.

We would just need to edit the Customer name. The idea here is to use that template as a standard form for all of your customers. 

As for the line item, we're unable to create a template or an invoice without adding it. Although, we can use a line item as a placeholder on the invoice. We would also need to add or remove items as we review and create the transaction. 

If you haven't done it yet, I'll lay down the steps to create a single template: 

1. On the Recurring Transactions page, click the New button.
2. Set the Transaction Type to Invoice, then hit OK.
3. Enter a Template name, then select a Type. 
4. Under Customer, add a placeholder customer profile. 
5. Set a specific Interval parameter. 
6. Add a placeholder line item. 
7. Add any other details, then hit Save template. 

A template would be saved. When we're ready to create an invoice, simply go to your Recurring Transactions list. Find the template, then click the arrow icon beside Edit. Select Use. 

If this invoice is for a different customer, we'll just need to select a different profile under Customer. Add or replace line items when needed. 

This method allows us to review the invoices individually before creating or sending them to the customers. 

Also, we do have the option to send the invoice at a later date. All we have to do is save the invoice after reviewing it, then use the Save and close function.

When we're ready to send it at the end of the day, we'll simply want to open it and use the Save and send option. 

After creating and sending those invoices, would you like some assistance in reviewing your current financial numbers? I'll lay down this article to help you run reports in the future: Run reports in QuickBooks Online. 

This thread's still open if you have more questions about managing invoices in QuickBooks. Though, you can always raise any other concerns you might have about your records, reports, entries, and more. Always here to help.