Hi info-amorinaccou,
Thanks for reaching out to Community. Welcome! QuickBooks Online is a superb cloud based software for all of your accounting needs. I can see how you'd benefit from splitting the receivable to keep your records aligned. I'll be happy to provide some insight here!
In QuickBooks Online, you'll have one Accounts Receivable and one Accounts Payable account as your default when setting up your company. However, when you come across a situation such as this, you can divide or group open receivables. I recommend reaching out to your Accountant for their expertise and the best course of action to ensure the outcome doesn't affect any other areas of your account. If you don't have an accountant, we can help you locate a ProAdvisor in your area.
If you have any other questions, please don't hesitate to reach back out. We'd be glad to assist!