This is in terms of showing demonstrated interest.
As in Google autofill? No. There’s no difference in typing out an answer and having autofill do it.
What do we mean by forms? If we’re talking about requesting information forms (like https://apply.college.brown.edu/register/joinourcontactlist ) then it’s no big deal.
Schools considering demonstrated interest consider signs such as going to an alumni interview or admissions officer info session, doing the “optional” essays (unless they truly don’t apply to you.) Some also track how often you are on their website or open their emails, though don’t stress to much about these IMO.
Schools don’t care how you fill in data on their website when contacting them for information or registering for a session, if that’s what you’re referencing.
The main purpose behind registration information is to provide authenticity and to show demonstrated interest. The best online proofreading service is a fine approach for those who want to get rid of burden of assignments.