"T/p enrolled in Medicare December 2022."

"T/P OVER 63 YEARS OLD."

Medicare is at 65, and then you no longer qualify to contribute to an HSA (my State offers Medical Savings Account provisions, though). That means 11/12 of the allowable limit for the year. More than this would be excess and needs to be corrected by distribution. And the employer should have stopped deducting.

The employer and employee amounts on W2 are considered combined as from the employee.

Did you enter the data from the W2, only?

You have a variety of issues, here.