If I may, a statement and some questions:
We had identical W4's and the only thing we did was check the "other spouse works" box and say that we had two kids. Based on this thread (thank you!) I realized that the latter was a mistake.
Question: is that likely the only problem we need to fix on our W4's at the present time? Reading over the W4, it doesn't feel like I have too many knobs to turn! Or is this more subtle than I perceive?
Question: Is withholding based on previous year's income? Could part of the problem be that we changed jobs to positions with higher salaries?
Thank you!