Can you be a bit more specific about what is it that you want to ask.?
Nevertheless here are some sources that I used to get clarity in HTML forms.
If you’re looking for a more visual approach watch this video
Do you have a question?
If so, please edit your post to include it in the Tell us what’s happening section.
Learning to describe problems is an important part of learning how to code.
Also, the more information you give us, the more likely we are to be able to help.