In order to make sure the tax receipt tracking works properly, analyze the following items, which are the primary causes for malfunctioning:

• Check whether the tracking number is incorrect
• Check whether the tracking URL is incorrect
• Check whether the transport company is incorrect
• Access the tracking URL by entering the number on the browser and check whether you are accessing the tracking monitoring page
• Check whether the transport company is on the list of companies registered for tracking.

Adjust these items and follow up the triggering of the e-mails using the time line in the order.