Can federal/state taxes, FICA, Medicare witholdings be verified in the middle of the year?

Question

or can it only be verified by a W2?

Answer 1

That information can be found on your paycheck stub....or at least, it should. :-)

Most employers will list the amount withheld for that pay period and also show the total amount withheld this year.

Just check the last paycheck stub your received and it should be there. If you cannot find the stub, contact your employer (payroll division) and ask for a copy of the latest check stub. Most companies should be able to furnish it.

Answer 2

What do you mean, "verified"?  The amount for your current paycheck, and often the ytd amount, should show on your pay stub.