On the back of the W4 is a Deductions and Adjustments worksheet. This worksheet will give you an accurate number to enter on line 5 of your W4.

How can I adjust tax withholding so that I don't get a large Tax Refund?
I'm interested in the simple algorithm for particles filter given here. It seems very simple but I have no idea on how to do it practically. Any idea on how to implement it (just to better understand how it works) ?

Edit:
This is a great simple example  that explain how it works. I've tried to implement it in C++: see my code here, but I'm note sure if I do it the right way. Can you please check if I understood it well, or there are some misunderstanding according to my code ?
