I have submitted my return and have already received a federal reimbursement. Although, I need to submit additional tax information by post. When will I receive payment?

I had to submit a second tax return after the e-file because I had received additional tax information from my school after submitting my taxes by e-file. I had submitted the amended taxes by post to the required addresses but have not received total federal reimbursement for the appended documents. When will I receive a return for this?