public static function tax_rates_save_changes() {
		// phpcs:disable WordPress.Security.NonceVerification.Missing
		if ( ! isset( $_POST['wc_tax_nonce'], $_POST['changes'] ) ) {
			wp_send_json_error( 'missing_fields' );
			wp_die();
		}

		$current_class = ! empty( $_POST['current_class'] ) ? wp_unslash( $_POST['current_class'] ) : ''; // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized

		if ( ! wp_verify_nonce( wp_unslash( $_POST['wc_tax_nonce'] ), 'wc_tax_nonce-class:' . $current_class ) ) { // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
			wp_send_json_error( 'bad_nonce' );
			wp_die();
		}

		$current_class = WC_Tax::format_tax_rate_class( $current_class );

		// Check User Caps.
		if ( ! current_user_can( 'manage_woocommerce' ) ) {
			wp_send_json_error( 'missing_capabilities' );
			wp_die();
		}

		$changes = wp_unslash( $_POST['changes'] ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
		foreach ( $changes as $tax_rate_id => $data ) {
			if ( isset( $data['deleted'] ) ) {
				if ( isset( $data['newRow'] ) ) {
					// So the user added and deleted a new row.
					// That's fine, it's not in the database anyways. NEXT!
					continue;
				}
				WC_Tax::_delete_tax_rate( $tax_rate_id );
			}

			$tax_rate = array_intersect_key(
				$data,
				array(
					'tax_rate_country'  => 1,
					'tax_rate_state'    => 1,
					'tax_rate'          => 1,
					'tax_rate_name'     => 1,
					'tax_rate_priority' => 1,
					'tax_rate_compound' => 1,
					'tax_rate_shipping' => 1,
					'tax_rate_order'    => 1,
				)
			);

			if ( isset( $tax_rate['tax_rate'] ) ) {
				$tax_rate['tax_rate'] = wc_format_decimal( $tax_rate['tax_rate'] );
			}

			if ( isset( $data['newRow'] ) ) {
				$tax_rate['tax_rate_class'] = $current_class;
				$tax_rate_id                = WC_Tax::_insert_tax_rate( $tax_rate );
			} elseif ( ! empty( $tax_rate ) ) {
				WC_Tax::_update_tax_rate( $tax_rate_id, $tax_rate );
			}

			if ( isset( $data['postcode'] ) ) {
				$postcode = array_map( 'wc_clean', $data['postcode'] );
				$postcode = array_map( 'wc_normalize_postcode', $postcode );
				WC_Tax::_update_tax_rate_postcodes( $tax_rate_id, $postcode );
			}
			if ( isset( $data['city'] ) ) {
				WC_Tax::_update_tax_rate_cities( $tax_rate_id, array_map( 'wc_clean', array_map( 'wp_unslash', $data['city'] ) ) );
			}
		}

		WC_Cache_Helper::invalidate_cache_group( 'taxes' );
		WC_Cache_Helper::get_transient_version( 'shipping', true );

		wp_send_json_success(
			array(
				'rates' => WC_Tax::get_rates_for_tax_class( $current_class ),
			)
		);
		// phpcs:enable
	}