Here’s how to export your Yahoo! Contacts from Yahoo Mail:

1. Launch Yahoo email and sign in.
2. Click on the Contacts tab.
3. Click the Actions dropdown box.
4. Choose Export.
5. Click Export Now next to "Yahoo! CSV" which is the type of program to which you want to export your contacts.
6. After clicking Export Now, you will see a verification code. Write it in the text box above the security code box and then click Export Now.

Note: You will see the download begin in 5 seconds or less. If it does not download within that time, click on "here" at the top of the page.