Just wait and see. You can't get it back or fix it. You have to wait to see if it's Accepted or Rejected. If it rejects for something then you can fix it and resend it. If it is Accepted then you have to wait for it to fully process and you get the first refund. Which might be a long time. Then you can Amend it. So DO NOT change anything until you know if it is Rejected or Accepted.