Can I add access to projects for a new user without giving access to other functions?

Hi there,

Welcome to the Community. It's great to learn your team is growing. I'll be happy to point you in the right direction with managing users on your account. 

QuickBooks offers a variety of user types that help you accomplish your goals with ease. The exact user you've described isn't available, however, you can utilize the Standard user.  You can grant roles using the customization options available. The Standard user can work with customers, sales, suppliers, and expenses on the account. Here's a helpful article that shows you how to: Manage user roles or permissions.  

Let me know if you have other questions by leaving a comment below. I'll be a message away.