Quick Change:
     1. Click the link here: https://www.paypal.com/us/wf/f=ap_namechg 
     2. Login to your PayPal account.
     3. Select the radio button "Business Name Change (business name)",
          then click the "Continue" button.
     4. Type in your new business name.

OR

Manually:
     1. Log in to your PayPal account and click Profile at the top of the page.
     2. Click Business Information in the Account Information column.
     3. Click Change name.
     4. Select Business Name Change (business name).
     5. Click Continue to complete the instructions.