Linking to Qualtrics from Recollective

I'm looking to link respondents participating in a Recollective Online discussion out to a Qualtrics Survey and once they complete the survey redirect them back to the Recollective discussion and pass a completion code back to Recollective. I have successfully redirected the respondents out of Recollective to a Qualtrics survey but not back to Recollective. Any tips on where to start looking to learn how to do this? Thanks!