Forgot to report tuition reimbursement on my taxes

I received a 1098-T for my taxes and freetaxusa used the American opportunity tax credit to refund me some money due to education cost being more than my grant, due to one semester not being from the grant. However the semester I paid for out of pocket last year was then covered in full by my works tuition reimbursement.

I am slightly concerned as I forgot to report this reimbursement but have already submitted and have my taxes approved. I'm not sure if this is an error I need fixed or if I have to wait for the IRS to send instructions to amend. Also would late penalties occur due to me submitting this the day before the deadline and any amends being made after the deadline?