Hi @unknownay
To convert create task collection output into string use the below function
Str = jsonConvert.SerializeObject(NewList), Note: Store this string value in queue for further performer bot if you want or else you use it in same flow.
NewList = Collection of Create Form task output
To convert deserialize into wait for form task input use the below function
Use deserialize action to convet into list
you can use output of deserialize action in foreach activity to getting taskID or task data one by one. Refer below image.
Mark it as Solution
Thanks!!!