I received an amended 1098T. I am a grad student whose fees are completely reimbursed and income too high for single to get any deduction. Should I still amend my taxes?

It depends. If the 1098-T will have less than $25 federal tax liability - you do not need to amend your return again.

I will have no liability for this amount, since this is fee paid to school. And my employer's W-2 states any perks/reimbursement given to me as an employee. Thank you so much for your reply.

If you will have no liability from the 1098-T, you do not have to amend.  It will be fine to leave it off.