Hi,

I came US in March'2015. My spouse and a 2 year old kid joined me in August'2015. I did not submit W4 form to get the Tax benefit yet. Now my family has to go back to my native country by first week of December. I have below queries:
1) Will I get Tax Benefit for the time my dependents were here?
2) Did I loose any money because of not filing W4 or I will get that money when I will file the Tax.
3) How much benefit will I get if my dependents will be here till 31st Dec'2015.

Thanks.