Tap Air Portugal's cancellation policy depends on the fare type of the ticket you have purchased.

If you have purchased a refundable ticket, you may cancel your reservation and receive a refund. The refund amount will depend on the fare rules of the ticket and the time of cancellation.

If you have purchased a non-refundable ticket, you may still be able to cancel your reservation, but you will not be eligible for a refund. However, depending on the fare rules of your ticket, you may be able to use the value of your ticket towards a future flight on TAP Air Portugal, subject to applicable fees and fare differences.

In general, if you need to cancel your reservation, you should do so as soon as possible to minimize any potential fees or penalties. You can manage your reservation and cancel your flight online through TAP Air Portugal's website or by contacting their customer service center.

It's also important to note that if TAP Air Portugal cancels your flight, you may be entitled to a refund or other compensation, depending on the circumstances of the cancellation.