Greetings, Pickle.
I understand the importance of seamless integrations of applications to QuickBooks Online (QBO).
While we're unable to directly recommend an application for managing your Account Receivable data, you can follow 4Gal's suggestion. Alternatively, you can visit the QuickBooks App Store or locate the Apps menu on your QBO account to look for applications that work well with the program.
I'll show you how:
- On the left navigation panel, choose Apps.
- Choose the Find apps tab.
- Select the application that suits your preferences.
- Click Get app now.

Furthermore, I've added these resources to guide you in managing third-party applications after linking them to your QBO account:
If you have more inquiries about integration to QuickBooks, comment below. We're available anytime to assist you. Take care and have a good one!