How to conditionally show field

Also, do you have the conditional option to make a field appear if a certain box is checked?

This can be achieved using Show/Hide field condition:

In it, you can check if a specific checkbox is filled (which means it's checked), and then, show the desired field:

If you have multiple options, you can test to see if the user selected what you need, for example:

You can click here to learn more.

I've created a test form for you. You can access it at the following link:
https://form.jotform.com/210345429960052

Feel free to test it, and clone it to your account to get access to the conditional logic. You can click here to see how to clone a field.

Let us know if you have any additional questions.