Hello there, @Cassie S.

Currently, setting a limit for users to clock in isn't possible in QuickBooks Time. I understand how important this feature working for you and your business. With that, I suggest sending feedback to our product developer. This way, they can add it for future updates.

Here's how:

1. Go to our QuickBooks Time help page.
2. At the bottom, click Suggest an idea.
3. Enter your request, then hit Post a new idea or Vote for an existing idea.
4. If you'd like to, choose a category.
5. Describe what you're requesting.
6. Select Post idea.

You can also visit this link to send feedback: Submit feedback to QuickBooks Time.

Let me know if you have other questions. I'm always here to help. Take care.