W2 wages HIGHER than salary

My W2 wages from my former employer are almost $4,000 higher than my wages. I was with them for 5 years and have never had this issue. Our paystubs show gross pay as well as taxable income and it does not match up to my W2. I have even added up every paystub & my deductions from health insurance from 2020 and I'm lost. My W2 has always matched perfectly with my final paystubs.

 

In addition to that, my federal income tax withheld is $2 more than paystub, social security tax withheld is $230 more than paystub, medicare tax withheld is $55 more than paystub, but state & city taxes withheld are the same as paystub.

 

I've contacted HR twice about it and they tell me its correct and they can't do anything about it and their advice is to pair up with a tax advisor, but I'm not gonna pay someone if it's their mistake. I've always done my taxes myself, so I don't have a tax person. They also can't tell me WHY there's such a discrepancy, which is very frustrating.

 

Does anyone have any ideas of why these numbers could be higher?? My employer did pay all of our insurance benefits from April-Oct while we were closed due to Covid, so I'm not sure if that's what's causing the increase? I worked in retail, we do NOT receive bonuses or anything like that.

 

How can I get this resolved when they refuse?

 

Thanks!!