hello,
I am trying to cancel a united airlines flight from US to UK.
brought tickets online at united.com.
this is what show up when I try to cancel-

Transaction summary

Credit
$6,354.70
To Future flight creditPlease use confirmation number XXXX to return to this canceled reservation in My Trips and make changes for a future trip. Change fees will apply when you use the future flight credit unless you qualify for a change fee waiver. Begin travel by: Feb 17, 2024.​​​​​​​

2 Adult (18-64) $4,830.00 Taxes and fees $1,524.70.

so how much of my money will be refunded or can be used to book new flights later?
are the taxes and fees not refunded?

Thanks.