Small issues and shortcode

None, leave the email switches alone. They only affect WooCommerce’s own
emails. Packing slips read the estimate straight off the order line.

Turn off “Save on the order” under Display > Orders & Emails instead. It then
is not stored at all, so it drops off slips, invoices, emails, admin orders and
My Account together. Note it only applies to new orders, anything already
placed will still print.

To keep it in your emails and strip it only from the YITH documents, leave that
on and add this. It also cleans up existing orders:

add_action(
‘ywpi_before_template_generation’,
function () {
add_filter(
‘woocommerce_order_item_get_formatted_meta_data’,
function ( $meta ) {
foreach ( $meta as $id => $entry ) {
if ( isset( $entry->key ) && ‘Est. Delivery’ === $entry->key ) {
unset( $meta[ $id ] );
}
}
return $meta;
}
);
}
);

Put it in your functions.php or wp-content/mu-plugins/quickshipd-hide-on-pdf.php.

This targets YITH WooCommerce PDF Invoice and Shipping List. If you are on “PDF
Invoices & Packing Slips for WooCommerce” instead, that is a different plugin
and needs a different hook, so let me know. We do not officially support YITH
in the free version, so the snippet is as is. A Pro version with proper
integrations and direct support is coming.

No problem, that changes the snippet. This removes the estimate from packing slips only, and leaves it on your invoices and in your emails. It also covers orders already placed, since it runs when the PDF is built:

add_action(
    'wpo_wcpdf_before_html',
    function ( $document_type ) {
        if ( 'packing-slip' !== $document_type ) {
            return;
        }
        add_filter(
            'woocommerce_order_item_get_formatted_meta_data',
            function ( $meta ) {
                foreach ( $meta as $id => $entry ) {
                    if ( isset( $entry->key ) && 'Est. Delivery' === $entry->key ) {
                        unset( $meta[ $id ] );
                    }
                }
                return $meta;
            }
        );
    }
);

Put it in your functions.php.It works for bulk printing too, which is what you want for the daily run.

If you would rather it came off invoices as well, change ‘packing-slip’ to
‘invoice’ on a second copy, or just turn off “Save on the order” under Display Settings.