Hi

I am married and have twin girls. I will quit my job on the 6th of January 2017 to take care of my daughters. My husband will be the only one working for rest of the year. what is the number of allowances he should claim on his W4 moving forward ? He is also resigning from his current job on the 6th of January to start a new one on the 16th of same month. I don't want to owe money at the end..............want to break even.

Thanks