Massachusetts has a $1,000,000 threshold (not an exemption) to determine if the decedent owes Massachusetts estate taxes. All assets owned by the decedent, including what is in a revocable trust, are counted. This includes life insurance, jointly owned property, revocable trust assets, as well as many others. Also, if the decedent made taxable gifts during his lifetime, he would have effectively lowered the threshold from the million by the amount of the taxable gift. If you are worried about estate taxes, it is best if you consult with an attorney who is knowledgeable in estate taxes. Many offer free consultations. CPAs may also prepare estate tax returns, but there is no attorney-client privilege that will apply if the return is selected for audit.