Check your W-2 and pay stubs carefully. By law, your employer* can only give you $5250 maximum, tax free, per year. Any amount over that is taxable income and should be reported on your W-2 as income. The amount should be included in box 1. There may or may not be aa additional entry, on your W-2 (box 14 usually).
So, if tuition was $11,000, and totally paid by the employer, then you can claim a tuition credit based on the amount that was paid by "your" after tax money (11,000- 5250= $5750).
* The rules are different if your employer is the school and the "employer assistance" is in the form of tuition remission. Then, it is all tax free and you can not claim a tuition credit.
Edited 10-5-21: If your employer is calling this on the job training (see additional reply below), then they did not need to include any of it on your W-2.
