For next time ... 'Help & contact' top of your Ebay page is really useful for queries like this.
I used 'personal details' as the search term and it probably took less time than it took you to type your question.
If you need to change any of your details, such as your name, date of birth, phone number, postal address, or email address, you can do it in My eBay - opens in new window or tab. Here’s how:
- Go to the Account - opens in new window or tab section of My eBay.
- Select Personal information.
- Find the section you need to update, and select Edit.
- Enter your new details.
- Depending on what you’re updating, you’ll be prompted to Save, Submit, or Confirm.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)