How do I add user with view access only with QBO Essentials plan?

Adding a user with view-only access isn't available in QuickBooks Online (QBO), Nancy.

With that in mind, you can explore the user roles available in the Essentials plan instead. For a clearer understanding of user permissions, click the View role descriptions link. Check out the image below for visual reference.

After reviewing the options, you can now add a new user and select the access permissions closest to your initial preferences or the one that best aligns with your needs.

On top of that, you can explore the custom role feature. This functionality is included in the Advanced plan and allows you to create and manage tailored user roles. If you're interested, you can upgrade your current plan at any time.

For more details on custom role access controls and permissions, see this article: Add and manage custom roles in QuickBooks Online Advanced.

Here's an additional reference article on user permissions: User roles and access rights.    

Don't hesitate to drop a comment below if you have further questions about managing your users or other QuickBooks-related concerns.