Definitely not Option 3: don't think it keeps with flow charting at all (my opinion). Problem with 1st option, it's not clear that each step is updating the same document. Problem with Option 2, looks like whenever the update is done, that's the end, regardless of which step took you to the update.
Does the completion of each step require the document to be updated before going on to the next step? Or, can, for example, step 2 proceed to step 3 without updating? If that's a possibility, then, a decision block needs to be inserted between steps. Somehow, need to show a return to the next step.
As Yacine says, Paul gives good advice, google re flowcharts.