Step 41 in registration form in HTML/CSS

I’m stuck on step 41. I never used :not(:last-of-type) selector. Can someone please help???

body {
width: 100%;
height: 100vh;
margin: 0;
background-color: #1b1b32;
color: #f5f6f7;
font-family: Tahoma;
font-size: 16px;
}

h1, p {
margin: 1em auto;
text-align: center;
}

form {
width: 60vw;
max-width: 500px;
min-width: 300px;
margin: 0 auto;
}

fieldset {
border: none;
padding: 2rem 0;
}
:not(:last-of-type) {
css declarations;
}

label {
display: block;
margin: 0.5rem 0;
}

Registration Form

Registration Form

Please fill out this form with the required information

Enter Your First Name: Enter Your Last Name: Enter Your Email: Create a New Password: Personal Account Business Account I accept the terms and conditions Upload a profile picture: Input your age (years): How did you hear about us? Provide a bio:

I can’t see your code. Please show us your code.

For this step though you can find some useful info here:
pals-i-need-help-registration-form-41