After you file

Self-employment tax for Social Security and Medicare will be 15.3%.  Beyond that, it is impossible to speculate on what your tax will be on your 1099 and W-2.  There are too many variables.  When you enter everything-- the 1099Misc and the new W-2 to your 1040X the calculations will be done.  This is a lesson in not filing too soon when all of your documents have not arrived.
**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.**