I think @DadOfJerseyGirl or someone hit it b4 - they don’t have internship apps. They use the same application as full time jobs and those ask for salaries….some companies may not even look at what you write - but often it has to be a # and then choosing hourly or annually.
So you take your best guess - and hope it doesn’t hurt you.
But kids today are not playing from positions of strength….so they should maybe not be as aggressive - IMHO.