Combining open invoices?

As I know this is one of the current limitations of QB Payment. You can ask your clients to use a free billing management app as a workaround to pay their multiple bills to your company in one payment. They can pay via ACH for free if necessary and you can accept it for free directly to your bank account without sharing your account and routing number. The only downside is you will need to reconcile the invoice payments manually.

Hi there, @info-ellitepoolc.

Open invoices can't be combined because they are created with different dates and customer details. Yet, I see how useful this feature would be on your end.

As a workaround, we can send a statement indicating transaction details and the balance due to your customer. However, we can send this one at a time. Here's how:

1. From the Sales tab, go to Customers.
2. Click the name of the customer you want to send the statement first.
3. Select the Statements option below. 
4. Choose the dates you want to send statements to that customer. Then, click Batch actions above the list and tap Send.

Check out this article for more info: Create and send customer statements in QuickBooks Online.

Also, you can look for a third-party application to perform this function.

In the meantime, you can submit direct feedback to our Product Development Team and enter your suggestions about open invoices. They might add this to our future product updates. 

Suppose you want to personalize your sales forms. you can read this article: Customize invoices, estimates, and sales receipts in QuickBooks Online.

Let me know if you have additional questions about managing your open invoices by leaving a reply below. I'll be willing to help. Keep safe, and have a good one.