Remove fields from WooCommerce checkout page.

remove_checkout_fields.php

<?php

add_filter( 'woocommerce_checkout_fields' , 'custom_remove_woo_checkout_fields' );
 
function custom_remove_woo_checkout_fields( $fields ) {

    // remove billing fields
    unset($fields['billing']['billing_first_name']);
    unset($fields['billing']['billing_last_name']);
    unset($fields['billing']['billing_company']);
    unset($fields['billing']['billing_address_1']);
    unset($fields['billing']['billing_address_2']);
    unset($fields['billing']['billing_city']);
    unset($fields['billing']['billing_postcode']);
    unset($fields['billing']['billing_country']);
    unset($fields['billing']['billing_state']);
    unset($fields['billing']['billing_phone']);
    unset($fields['billing']['billing_email']);
   
    // remove shipping fields 
    unset($fields['shipping']['shipping_first_name']);    
    unset($fields['shipping']['shipping_last_name']);  
    unset($fields['shipping']['shipping_company']);
    unset($fields['shipping']['shipping_address_1']);
    unset($fields['shipping']['shipping_address_2']);
    unset($fields['shipping']['shipping_city']);
    unset($fields['shipping']['shipping_postcode']);
    unset($fields['shipping']['shipping_country']);
    unset($fields['shipping']['shipping_state']);
    
    // remove order comment fields
    unset($fields['order']['order_comments']);
    
    return $fields;
}

@adoWEB-code https://www.templatemonster.com/help/woocommerce-how-to-remove-checkout-fields.html

It's placed in your theme's functions file

Or the plugin Snippets

When all fields are unset, the paypal paymentvtype does not work for logged in users. It ops the paypal login page then immediately closes it. Some of the paypal javascript does not work either. Help

Thank You Bro

the most valuable update here could be I think that you need to set priority to 9999 to the hook because we want to run it as late as possible. The code will be. That helped me a lot, 'cause billing_address_2 and billing_first_name fields were not hidden until I set this priority. Hope this helps someone 😉
add_filter( 'woocommerce_checkout_fields' , 'custom_remove_woo_checkout_fields', 9999 );