...
Log into Certify.sba.gov with your current email address.
Click “Profile”
Click “Edit Profile”
On this screen you can edit your First and Last Name, your phone number and your email address. Then enter your CAGE code, if applicable, and the If you do not have a CAGE code, leave this field blank. In the next field, enter the bank account number you entered into your http://SAM.gov profile. If you have a CAGE code, you must enter the Bank Account Number associated with that CAGE code. Then, and click “Update”.
You will receive an email confirmation to confirm the active email address. Once the email is confirmed you will be able to log into Certify.sba.gov with the new email address.
...