Married filing jointly total household income

For the last 2 years, we seem to be paying more to the federal and we think it may have something to do with how my wife filled out her W4 with her employer. I’m still unsure how it works. I guess my question is…We are married filing jointly. I have one full-time job and my wife has one full-time job, if we both need to fill out a W4 for each Employer, do we need to input our combined (or think we will be making) income for the year in Step 2(b) section 1 for both employers W4’s? I think that’s where we screwed up.