Welcome and thank you for reaching out to us here on the Community page, @Rante-J--Ramos.
Let me share some insights about managing users in QuickBooks Online (QBO).
We're able to add a standard user wherein we can set different levels of access for the user you want to add. However, we can only limit them to customers and sales, suppliers and purchases, customer and sales, plus suppliers and purchases, and payroll access.
At this time, we can't set a user to just add transactions only and disallow the option of deleting or editing transactions.
For additional reference about adding users in QBO, check out these articles:
Get back to me if there's anything you need assistance with. I'm a few clicks away to help!
