How to make a form field requred based on the selection of another field?

How do I make some fields, must fill if curtain fields are checked

If I understand your question correctly, you want to make some form fields a required field if some other form field is filled. Is that correct?

Yes it is possible to achieve your requirement by taking advantage of our conditions feature of "ENABLE ? REQUIRE FIELD". Please check the screenshot below on how to add condition to make form fields required based on the selection of another field:

Hope this helps.

Do get back to us if you have any questions.