Move data back and forth between sheets

Is it possible to move data back and forth between sheets upon updates? As an example, I have a Master sheet and another sheet based on items that are assigned to me. I can get lines to copy to my "assigned" sheet but if I make an update in the "assigned" sheet, can the updates flow back to the master without creating a duplicate line?

We will have ongoing updates and I would like the changes made to all sheets no matter which one I make the update in.

Answers