Updatable PDF forms -Adobe uses PeopleSoft User ID.

We are trying to implement self-service fluid updateable PDF form feature but we have an issue since we uses Single Sign-on user ID and PWD but Self-service updatable PDF form needs PeopleSoft User ID and password to update tax withholding parameters to update back to PeopleSoft HCM. We have use two different passwords in PS and Sigle Sign on. How can we use the feature using single sign on credential in updatable PDF form? . Please let us know if there is a possibilities using new PeopleTools version or any other ways.