You can change your personal details, such as name, date of birth, gender, relationship, marital status and nationality by logging into the UAN portal. However, please note that these details will only be updated on the UAN portal if they match the details on your Aadhaar card and are approved by your employer through a joint declaration. You can also change your e-mail ID and mobile number on the EPFO portal without the approval of the employer.To update/change the name and date of birth, click on the ‘Joint Declaration’ option under the ‘Manage’ tab after logging into the portal. Next, enter the updated details, upload the documents and click on the ‘Submit’ button. Your employer will have to approve the changed name and date of birth. Once the employer approves it, the EPFO will update the details on the UAN portal. To update the mobile number or e-mail ID, log in to the UAN portal and click on ‘Contact Details’ under the ‘Manage’ tab. Enter your updated mobile number or e-mail ID and click on the ‘Submit’ button.