Thanks for reaching out to us, ajeethd.
You'll want to set up your staff as Standard user and customise their access rights to limit only to certain options. Let me guide you with the steps.
Please check this for more information about different user types in QuickBooks Online (QBO): What Different Types Of Users Can I Add To My Company?
For future reference, you can visit this article for additional information:
You can always touch base with us if you have any other concerns. We're always right here to help.