You can add the abstract to your registration form. If you did not do it during registration, you can do it till September 22 by opening the registration confirmation email.

1. Open your registration link from the email;
2. At the bottom of the page, click Manage my registration;
3. Click Modify;
4. Add your abstract;
5. At the bottom of the form, confirm by clicking Modify.

Instruction for submitting your abstract.