Withholding Tax Example

function ds_edd_adjust_commission_rate_for_withholding_tax( $recipient, $commission_amount, $rate, $download_id, $commission_id, $payment_id ) {

	$payment      = new EDD_Payment( $payment_id );

	$commission   = new EDD_Commission( $commission_id );

	$address      = $payment->address;

	$shop_country = edd_get_shop_country();

	// Set the commission meta key

	$meta_key = '_eddc_withheld_amount';

	// Sanity check - fail if purchase ID is invalid

	$payment_exists = $payment->ID;

	if ( empty( $payment_exists ) ) {

		return;

	}

	// If the payment country matches the shop country reduce the commission amount by 30%

	// Store the withheld amount as commission meta (_eddc_withheld_amount)

	if ( $address[ 'country' ] === $shop_country ) {

		$withheld_amount        = round( (float) $commission->amount * 0.30, 2 );

		$commission->amount     = (float) $commission->amount - round( $commission_amount * 0.30, 2 );

		$commission->update_meta( $meta_key, $withheld_amount );

		$commission->save();

	}

	// Add a note to the payment record recording the tax amount withheld

	$note = sprintf(

		__( 'Tax of %s withheld for %s &ndash; <a href="%s">View</a>', 'eddc' ),

		edd_currency_filter( edd_format_amount( $withheld_amount ) ),

		get_userdata( $recipient )->display_name,

		admin_url( 'edit.php?post_type=download&page=edd-commissions&payment=' . $payment_id )

	);

	$payment->add_note( $note );

}

add_action( 'eddc_insert_commission', 'ds_edd_adjust_commission_rate_for_withholding_tax', 10, 6 );