No, you don't want to use line 4(b) to get the withholding you want. This is used to help them figure your withholding if you itemize. Any number there will reduce withholding.
You can leave lines 4(a) and 4(b) blank and enter $1000 on line 4(c). They will take out an additional $1000 per month (assuming you are paid monthly).
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
