Hi w00dhuff22,
If your overpayment was present on PAYE, we can only repay as much as is overpaid.
If your first repayment request has been processed, the second will not be actioned as no more overpayment will be available to repay.
If your credit was present on Self Assessment, and a second repayment request might refund a statement credit that you had been paid to cover a balancing payment.
Please contact us by webchat or phone here:
Self Assessment: general enquiries
Thank you.