Retirement tax questions

You mean you had an extra $100/month withheld for taxes?  That would have been included in the amount you saw in box 2 of your W-2, so your refund was calculated based on the amount you had withheld.  There is no place on a W-2 to list "extra" money you had withheld;; it is just added to the amount your employer withheld for taxes.

**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**