Hello @FinwayGene ,
Welcome to the Docusign Community and thank you for posting your concerns!
I understand you need to add two signature fields but have the signer sign only one depending on a Yes or No answer.
Unfortunately, what you are looking for can not be achievable with signature tabs alone, you would need to add radio butto9ns (or checkboxes with a certain validation to make it required) and have them select a Yes or No option and depending on the response a signature field shows up.
Hidden fields to then have them appear depending on the answer of a different field is called conditional logic: Conditional Fields
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!