Split Pay is one account per person. Your eligibility, your payment account numbers, and your payment history are tied to you — verified by your SSN — and they exist on exactly one account: the first account you created. A second account wouldn't have any of that, which is why creating one isn't possible.
If you sign in or sign up with a different email but a matching phone number, we'll show you the email on the first account you created so you can sign into the right place. Any extra accounts from the past were closed as duplicates — everything you've built with Split Pay lives on the first account you created.
If you can't access the email on the first account you created, don't start over — see I lost access to the email on my Split Pay account — what can I do?