Contact
One address, read by a person. Questions about the method, problems with your account, and privacy requests all go to the same place.
support@yearfolio.comThere is no form here on purpose. A form would need somewhere to send things, and an address you can see is a better promise than a box that says thank you.
If you are asking about your own data, mention the email address you signed up with so the account can be found. What is stored and what you can ask for is set out in the privacy policy.