discrepancy with overtime taxes in w-2?

Hi,

It seems that my tax lady has not been a help unfortunately…

I got an email from HR from work stating that I had about $5,791 estimated qualified overtime premium eligible.

However, once I received my W-2 i only have around $759 OT premiums.

Have tried calling HR multiple times… Have not been helpful!

Anyone have any advice? What could have happened? Thank you all!