How do I add contacts from forms to MailChimp?

1. Go to Site settings → Forms → MailChimp.
2. Enter your MailChimp account login and password and allow access.
3. Select the subscriber list to which data should be added, or create a new one.
4. Confirm or skip the step "Assign service to all forms on the website?".
5. If you skipped the previous step, go to the web page Editor, open the Content panel of the block containing the form and select MailChimp as a Form data receiver service. 
6. Publish all pages.

Learn more about adding contacts to a MailChimp mailing list: http://help.tilda.ws/formsmailchimp