There is no account and no support portal. There is an address, and a person reads it.
The address ends in plaifair.ai, not formforlater.com, because Form For Later is published by Plai Faiar LLC.
Tell us what page you were on, what you expected, and what happened instead. If Form For Later showed you a message, quote it — the messages are written to be specific, so the wording narrows it down quickly.
Send the address you signed up with and it will be deleted outright — not marked, not archived. Nothing is left to say it was ever there.
Most answers are already in the privacy policy, which cites the file and function behind every claim it makes. If yours isn't there, ask.
Form For Later keeps what you type on the device you typed it on. There is nothing for us to look up on your behalf and no account to reset — which means a support request is a conversation, not a ticket.