I need some help adding checkbox in custom HTML
Please give more context. Are you talking about the asterisk for making the field required? I highly recommend using CSS to hide the required asterisk on a checkbox field so you can actually saved the submitted data using Forms features.
What are you trying to do with this form? What have you done already and what problem are you experiencing?
What is your end goal? There are a lot of reasons to use a check box field instead of creating your own checkboxes as part of custom HTML. Why do you want to create your own?
If I use checkbox the asterisk should be at the end. So I am trying to do in HTML instead of checkbox