Directly from Deso permit confirmation email.
If you cancel your reservation at least 31 days prior to your entry date, all reservation fees collected will be refunded. The $6.00 transaction fee is non-refundable for all reservations. If you cancel your reservation 30 days or less prior to the entry date, none of the fees will be refunded.
No Show Policy:
If you do not cancel and decide not to use your reservation, none of the fees will be refundable. Please cancel your reservation if you are unable to use it as this opens quota space for others.
Changes to a reservation can be made any time provided that you have not printed your permit.
Change in the number of people while keeping the same dates: If you are increasing your party size, $25.00/person reservation fee will apply. Decrease in group size at least 31 days prior to the entry date, the per person reservation fee will be refunded for the number of people reduced.
Change in the entry date: Cancel your current reservation and reserve the desired date(s) if space is available. Reservation and transaction fees will apply to the new reservation.
Make changes, confirm group size or cancel reservations through the web at Recreation.gov or call the NRRS reservation line (1-877-444-6777).
ONLINE PERMIT PRINTING:
The permits can be printed online through your Federal recreation, camping and tour reservation information - Recreation.gov
The system will allow you to print your permit as soon as you complete your reservation. It is always recommended that you only print your permit, once you are sure that you will not be making any changes to your permit or will not be cancelling your permit.
Please note that once you print your permit, the system will not allow any changes to your permit. If you decide to cancel your permit after it has been printed then there will be NO REFUND."