Tax Toggle for WooCommerce - How to show From X to X price label on variable products

functions.php

<?php 
/**
 * Customisation of Tax Toggle for WooCommerce to show From X to X price label on variable products.
 *
 * Based on Tax Toggle for WooCommerce 1.3.6
 *
 * Plugin: https://1.envato.market/taxtoggle
 *
 * @param string $price Price.
 * @param object $product Product.
 * @return string $price Price.
 */
function ttp_custom_wootax_update_price_html( $price, $product ) {
	if ( $product->is_type( 'variable' ) ) {

		$min_price = $product->get_variation_price( 'min', true );
		$max_price = $product->get_variation_price( 'max', true );

		if ( $min_price === $max_price ) {
			return $price;
		}

		// setup custom text options.
		$wc_incl = __( 'Incl.', 'wc-tax' );
		$wc_excl = __( 'Excl.', 'wc-tax' );
		$wc_zero = __( 'No Tax', 'wc-tax' );
		$wc_from = __( 'From', 'wc-tax' );

		$wootax_text = get_option( 'wc_tax_text', 'VAT' );
		// set default tax word if option is not set.
		if ( '' === $wootax_text ) {
			$wootax_text = __( 'VAT', 'wc-tax' );
		}

		$product_tax_rates = WC_Tax::get_rates( $product->get_tax_class() );
		$min_price_tax     = WC_Tax::calc_tax( $min_price, $product_tax_rates, false );
		$max_price_tax     = WC_Tax::calc_tax( $max_price, $product_tax_rates, false );

		return '<span class="amount product-tax-on product-tax" style="display:none;">From ' . wc_price( $min_price + array_sum( $min_price_tax ) ) . ' to ' . wc_price( $max_price + array_sum( $max_price_tax ) ) . ' ' . $wc_incl . ' ' . $wootax_text . '</span><span class="amount product-tax-off product-tax">From ' . wc_price( $min_price ) . ' to ' . wc_price( $max_price ) . ' ' . $wc_excl . ' ' . $wootax_text . '</span>';
	}
	return $price;

}
add_filter( 'woocommerce_get_price_html', 'ttp_custom_wootax_update_price_html', 101, 2 );