There's an extra $20.00 (biweekly) taken from my pay check, why is it the W-2 does not reflect that saving?

[SweetieJean]

Are you saying that the number taxes withheld on your W-2 is wrong?

[Opus 17 · Accepted solution]

If you write on the W-4, "withhold an extra $20", that money is already taken out of your check and is reflected on your pay stub and in box 2 of your W-2.  Box 2 is already $20 per week more than it would be without that notation.

There is no separate notation for additional withholding, its all part of the total.

If you think your employer is not honoring that request, you would have to compare your actual withholding with the results from the tables here https://www.irs.gov/pub/irs-pdf/p15a.pdf