FWIW, many users are using a limited-feature mobile app, with no option to withdraw an ID. Some one kindly commented I should consider doing such-and-such. I could see no way to do that on my phone app and wrote my puzzled query to iNatHelp. I know I was shocked - well, very surprised - when the (very prompt) reply said that functionality only existed on the website.
?!? There’s a website? With more features than the app? 
Shoot, I was used to places like Yelp reducing access via the website in favor of to push users to their app! It never would have occurred to me to find more functionality on a web interface.