To edit your responses, you can simply click on the corresponding drop-down box of the information block that you would like to edit and make your changes to your responses. For example, if you wanted to change the address you entered, you could click on the "Contact Information" section.
If you have already completed the questionnaire and submitted your payment, you will have to reach out to the Issuer's Investor team via their support email found in the footer of the webpage to request for your agreement to be reset. Once reset, you will be able to access your profile, make the necessary changes, and re-submit your agreement.