Hello AccounantYYC,
It's great to have you reach out to us here. QuickBooks is a flexible program that's designed to help you streamline your work. I'll be glad to share more info so you're on the right track.
The program allows you to open your client's Desktop file so you can work on it and send it back so the client can continue working. That said, I see you benefiting more by checking out the following article that shows you how to: Create an Accountant's Copy of your company file in QuickBooks Desktop. You're welcome to ask questions as you go through the steps in the article.
I'll be one message away. Otherwise, I wish you a great rest of the week!