Yes you can. Simply go to the "My Accounts" page and click the "Edit Tax Return" Button All the answers you provided previously will be displayed again - as you left them last time you worked on this. You can then scroll down to edit the information entered previously. IMPORTANT NOTE: Some fields only come up depending on information in other fields. i.e if you have selected to enter 2 children, and you now want to add a third, then you would change the question about "How many children did you support at the end of the financial year" to 3. Then the wizard needs to display more fields about the children's names and birthdays etc. This is a very complex process which is not fully supported at the moment. We are working hard to make this absolutely perfect. IN THE MEANTIME: If you have information that you need to edit, but the wizard behaves weird, simply click on the "?" button and select to send us a mail (click the link in the bottom of the window that opens up" - simply tell us what you need changed and we'll quickly do it for you. Also subscribe to our newsletter so that we can keep you up to date about this development. Thanks for understanding.