On the page where you can see your completed tax return, look right above the return is a medium sized orange arrow button, pointing to the left, under the arrow it states, "change an answer".
Click on the arrow, this will take you back to the questions/conversation with Tim.
You can scroll down the page and make at any time. Just click a different option, or enter a new answer to any question. Your tax return will update with the new information automatically.
If you made any changes – remember to reprint the return before submitting.