Hi Kat1199,
Thank you for visiting the QuickBooks Community! I'll be happy to assist you in finding an app.
I can still search for Zenefits in the QuickBooks App Store. However, if they no longer support QBO, you can find a similar app. Just click the Apps menu on the left-hand side of the dashboard to search one.
We're unable to suggest one because we're not trained for third-party apps, and we have limited information about their features. If you find one, you can contact their Support or visit their website to see more information. Their contact details are on the right side, as shown below.
Let me know if you have other questions in mind. Take care and have a good one!