Recalculate Invoice Total?

[Burti]

Hello,

How can I recalculate it invoice total ?

 

			$postData = [
				'invoiceid' => $invoiceId,
				'taxrate' => '0.00',
			];

			if($paymentMethod == 'xMethod'){
				$postData['taxrate'] = '18';
			}
			$command = 'UpdateInvoice';

			$results = localAPI($command, $postData);

 

Its updated invoice but it does not calculate & update the total..