<prompt> Human: Wife and I live in CO, no kids, we just bought a house in may and we both claimed 0 on our W-2s. I did a preliminary return on TurboTax the other day. I entered my info first, and was allegedly due to receive 1800 return, awesome. I then enter my wifes info and the number changes to we owe 1900. Enter the house info and other write-offs energy-efficient, charity donations, etc. and that number dropped to we owe 1300 to federal. Combined income was just over 100k. I dont understand at all, I always thought if I claim 0 they take more from each paycheck and I get more on my return. I also thought home interest helps increase the amount of return. Whats the deal?  <response>: I entered my info first, and was allegedly due to receive 1800 return, awesome.100 irrelevant. I always thought if I claim 0 they take more from each paycheck and I get more on my returnSure, if youre single or the only income in your household. I assume you and your wife earn similar amounts? I also thought home interest helps increase the amount of returnIt did. You owe 600 less. 