I am facing into an exit interview with HR. Has anyone gone thru this process?
They will want to know why I am leaving, the form has certain boxes to tick, early retirement is not one of them.
I just want to be prepared and not have any drama. I could say, its none of their business.
Dude. Not worth the stress. Just tell them what you're doing, why you're doing it, and be friendly.
"Seeking other opportunities" or such is accurate. You're seeking the opportunity of freedom.
I went through an exit interview with a large tech employer 6-7 months ago - my reason for leaving was, "I don't like living in Seattle, I have an opportunity to move to rural farm country to live near family and raise my kid, and I'm taking it." We talked for a while about shipping container offices, gardens, solar panels, and it was great fun. It wasn't anything wrong with the company, other than their lack of remote work options and their insistence on putting offices in urban hellholes (my opinion is rather clearly the minority view on that).
Zero stress. You're set. If they try to counter, just tell them no. Unless they say something like, "Your work is incredibly valuable, would you take $5M to stay for another year?" Then, uh, maybe take it. :)