It is great that you solved the challenge, but instead of posting your full working solution, it is best to stay focused on answering the original poster’s question(s) and help guide them with hints and suggestions to solve their own issues with the challenge.
We are trying to cut back on the number of spoiler solutions found on the forum and instead focus on helping other campers with their questions and definitely not posting full working solutions.
So what the question is asking you to do is basically wrap the existing input (found on line 19) in open and close form tags.
The second part to this problem is after you place your form tags around your input tag on line 19 your open form tag needs to include an action inside of the open tag. This action will submit the data entered in the input box to a server connected to the site.