My mom's will was very detailed. The family all knew about it and her wishes before her death. She had divided her assets between the family and had let her insurance co. and IRA holders know her wishes. After my dad died, she opened a joint stock account in both of our names. Upon her death the family carried out her wishes. We contacted the attorney who did her will along with her financial planner and was told everything was ok. We did have to go through a small probate for her car. Now because of this we are being told we have to pay "estate tax" on her estate. Where do I go to find out exactly what we have to pay tax on? The stock was jointly owned, there is several life insurance policies, and IRA account. She also had a home which a family member did inherit.