Hi @ stvcdms,
Could you please share a screenshot of the configutation of your flow?
Do you use the "update item" action in your flow to update the value of the Managed Metadata Column in your sharepoint list?
I have made a test on my side, the Managed Metadata Column couldn't be updated in the "update item" action, update the Managed Metadata Column is not supported in microsoft flow currently,
If you would like this feature to be added in Microsoft Flow, please submit an idea to Flow Ideas Forum:
https://powerusers.microsoft.com/t5/Flow-Ideas/idb-p/FlowIdeas
Regards,
Alice Zhang