By law your employer can only give you $5250 maximum, tax free. If your tuition was less than that, and you employer reimbursed it all; it’s safe to assume it does not need to be reported. You do not even need to enter your 1098-T. You have nothing to claim.
If you got more than $5250, the amount above $5250 is usually already included in box 1 of your w-2 and you do not need to enter any additional income on your tax return.
But, since you have paid tax on that part, it is considered your after tax money and that amount can be used to claim the tuition credit. For tax purposes, it’s not really reimbursement, it’s your money.
