Under what circumstance can you use the TST Function on a prescription?

Using the TST (Temporary Shipping Tool) function on a prescription is specifically applicable when there is a need to modify the shipping address temporarily. This is particularly relevant when a customer may have a different shipping address that should be effective starting from the date the TST drop occurs. This functionality ensures that the prescription is sent to the appropriate location while accommodating the customer's current needs without altering the permanent shipping address on record.

In this scenario, it is critical to understand that the TST function is designed to manage temporary changes, making it suitable for instances where an alternative shipping address is required for a specified duration. This helps maintain an accurate record while providing flexibility for the customer.

Other options involve circumstances that do not directly pertain to the temporary adjustment of shipping details, making them unsuitable for the use of the TST function.