The element used for forms is the form element. The main attributes are action (where the form data is going to be processed) and method (what type of data request will be triggered).
<form action="" method="GET"> <!-- If the action attribute is empty, the same page will be used to process the form data -->
<fieldset>
<legend>Join our email list</legend>
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<ol>
<li>
<label for="firstlast">Name: </label>
<input type="text" name="fullname" id="firstlast">
</li>
<li>
<label for="email">Email: </label>
<input type="text" name="emailaddr" id="email">
</li>
</ol>
<input type="submit" value="Submit form">
</fieldset>
</form>