'Pretend' you are buying license
Go thru the steps and when you get to the page of 'Purchase Habitat Stamps' select that
When that page opens, scroll down and you will see what you have on file
If you have a '500' code behind your 2015 Moose APP, you are a very lucky person.
What unit? I apply for a pref point for elk followed by ML either and lastly ML cow. Looks like I succeeded with something (unit 131, which is license 01: the big group of units). Haven't missed out in several years, but 10 years ago would always apply for deer just in case.