In the top left corner, click Dashboard

Click on the Registration section to expand it

Find and click on the desired registration to open it

You will see the middle section of the page has sections of questions and answers.  You can click on each section, then click the green Edit button to edit the answers as needed.

Once you have updated the necessary information, click the blue Save button to save it.

Continue to another section if needed and follow the same steps to edit.