Hello @Taylor216, since you posted in our community a few days ago, I am wondering if you still need help with this. I am reaching out to our expert Hosts, @Joan2709 and @Joelle43, to see if they would like to offer some insights.
Has the guest already started their stay? I believe they would need to in order to "send money." If they haven't started their stay, you would do a change request on the reservation (scroll to the bottom of the reservation details). Yes, it would change the taxes & Airbnb Service Fee (Airbnb should automatically do that). If you have a cleaning fee (or any other fees), you would need to be sure you include that in the revised price per night calculation.