@Sean--Erica--And-Kendal0
Sean that answer above is not entirely accurate. You can find any credits and coupons you may have at any time by logging on, go to your 'Account Settings' and click on 'Payment Method' !
Underneath the payment method box you will note the section that deals with credits.....as per this screenshot!
When you receive a credit or a coupon it will be automatically added to this part of your account settings!
Superhost travel credit is awarded for each year of continuious superhost achievement. I have had 3 now. As soon as you use the credit it will disappear from this section, you can't use part of it....if the credit more than covers the cost of the reservation you do not retain any credit balance, you are deemed to have used the credit!
I hope this helps.
Cheers.....Rob
PS: One interesting thing I did notice, this credit floats with currenct variations! It is not worth as much now as it was when I got it a month ago!