Help with W-4 and Insurance Contributions

Hey everyone,

I need some help clarifying how to properly fill out the W-4 Employee's Withholding Allowance Certificate (federal and state). I have a domestic partnership and recently had a child, who I’ll be reporting as a dependent on my tax return. Up until now, I’ve always reported as single with no dependents, so I’m not sure how to adjust my allowances to reflect this new situation. Any advice on how to do this properly would be greatly appreciated!

Also, I plan to add my significant other and newborn baby to my health insurance. Does Boeing’s contribution toward their insurance get reported to the IRS as untaxed additional income? I’m trying to figure out if I need to allocate more money toward taxes to cover this.

Thanks in advance for your help!