Hello,
Thank you for reaching back.
I understand the idea of several approvals, however, what I mean from the previous comment is that Powerforms are usually Direct (the signer clicks the link and goes into the document), by doing so the signer becomes an embedded signer which would not allow the envelope to return to them once the signer completes their action, one of the characteristics of the collaborative fields is that you can choose to have the previous signers initial the changes made to their fields by one of the approvals, but in this case, as the recipient is embedded they can not initial the form and it will remain stuck. If the Powerform has email validation (meaning the signer clicks the link but instead of being taken to the document, they get an email with a link to the document) all of the above can be possible.
Regarding the formula field, I have tried several ways to accomplish your request, however, the only way I was able to do so was by adding a text field (with number validation) and adding the number "1" to each one, after that, I created a conditional rule and liked the Return date to one of the text fields and the Departure date to the other(when creating the rule, make sure to select "Any text" in the top center from the settings icon): https://support.docusign.com/s/document-item?language=en_US&bundleId=gbo1643332197980&topicId=iqw1578456520131.html&_LANG=enus
Once I had those rules, I created the formula using the text box with the number 1 in them, I recommend you set those boxes to "Read-only".
Let us know if you need further assistance with this.
Best regards,
Nathaly | DocuSign Community Moderator
"Select as Best" below if you find the answer a valid solution to your issue!