Tagging incoming records from forms

Hi all (please forgive my amateur status & language) - I have two forms that feed into one base. Is there a way to tag the entries on the backend so they can be categorized separately? (For instance, some are coming through an application form, and others through an interest form.) We want the entries to be tagged based on which form they’re coming from, but the only tags we can see are based on what the user is selecting on the form itself. Thank you!!