Final answer:
To update the travel voucher, the correct option to delete the taxi expense is option 1) Taxi, because the courtesy shuttle provided by the hotel was complimentary, and there is consequently no expense to record for this service.
Step-by-step explanation:
If you estimated that you would take a taxi from the airport to get to your hotel for a business trip and the expense was pre-authorized, but you ended up using the hotel's courtesy shuttle, you would need to update or delete this expense from your voucher. The correct option to remove or delete this expense would be option 1) Taxi, as this was the pre-authorized expense that you did not incur. Since you used a complimentary shuttle, there is no actual expense to record for the transportation from the airport to the hotel. It's important to ensure that your voucher reflects the actual expenses to maintain accuracy in travel and expense reporting.
The appropriate option to delete the expense of taking the hotel's courtesy shuttle instead of a taxi from your voucher would be option 2) Hotel's courtesy shuttle. Since you ended up using the hotel's shuttle instead of a taxi, it is important to accurately reflect this change on your voucher. By selecting option 2), you are acknowledging the change in transportation and removing the taxi expense from your voucher.