<form action="https://fabform.io/f/xxxxx" method="post">
<label for="firstName">First Name</label>
<input name="firstName" type="text" required>
<label for="lastName">Last Name</label>
<input name="lastName" type="text" required>
<label for="email">Email</label>
<input name="email" type="email" required>
<label for="files">Choose files:</label>
<input type="file" name="files" multiple required />
<button type="submit">Send</button>
</form>
name your form elements
method = "post"
Insert form id here