If you already received your refund, the IRS apparently accepted the changes you made in the efiled return. That is the problem with mailing a return and then later efiling a return. Now you don't know what to do because the IRS is processing both the mailed return and the efiled return.
Make sure the deposit in your account was the refund from your federal tax return and not a stimulus payment or a refund from a state return. If it was a refund for your federal tax return and was the amount shown on your efiled return, I would respond to the request by sending a note to the address where the request said to send it telling them a later efiled return has already been processed and you have the refund.
