Hi @vera-bernhard,
If the dependency between tasks consist only in that the annotator must answer different questions about the same input but their answer to one question does not impact the formulation of the next question, it should be fairly easy to implement, especially that you have just one annotator (for multiple annotators the function would be more complex to ensure they see all questions per given input).
In Prodigy the task stream can consist of task with different view IDs that you can define on the task level so you could design your stream to show each input multiple times, each time with a different annotation task. Pretty much what you were sharing in Keeping Duplicates in Stream I think.
Please see my answer there re the deduplication issue and let's see if that solves the problem.