Hi @tye,
We do! I believe you will want to use the yikes-mailchimp-checkbox-integration-body filter for this, as you are trying to modify tags. We also have an article on modifying merge vars in CF7 here.
The filter I mentioned receives the following arguments: $data, $type, $list_id, and $integration_vars. $data is ultimately the body of the request to Mailchimp, and should be returned by your filter function. As shown in the Mailchimp docs, you’ll want to add a tags key to the $data array with a list of tags to apply.
If you want to explore further, here is the line in question.
Let me know if that helps,
Jon
