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When you add a PayPal payment question in your form, it asks you your "PayPal Account" where you can input your PayPal account email address. Your payment form get integrated to that PayPal account. Please check the screenshot below:
If you receive any payment submission in your form, PayPal will credit the amount to the account with which you integrated your payment form.
I did check the only form you have in your account and did not find that you have added any PayPal payment question. You may like to check the following guides which should help you:
Hope this answers your query.
Do get back to us if you have any questions.