Multiple Life Events

Hello,

This year my wife and I had our first child, bought our first home, and got a new job. I was wondering what the best course of action will be when we file our taxes for this year. I was also wondering how to update our w4's. I work a normal salaried position, but my wife gets a base wage with additional added depending on how many clients she sees in a week. She also recently started working another job on the side with a wage. Will she need to update her w4's for both employers?