I guess you want to add another paypal email instead of opening a new account.
Here'S how you do it:
On the My Account Overview screen click "Edit Profile" which is next to your paypal email address.
Under the Account Information headline click "Email"
Then click "Add" to add another paypal email linked to your paypal account.
You can then make your new email primary or confirm it. It's up to you.
Have a good day
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