It might be wise to take a fresh look at your estate plan for new options.
Many estate plans will need to be changed to take advantage of the new tax laws, according to the Wills, Trusts & Estates Prof Blog in "A Gift from the New Tax Act: Kill That Trust."
Thais means people with estate plans that created trusts for the sole purpose of limiting their estate tax exposure may want to revisit their plans. They might now be better off revising those trusts or even getting rid of them altogether.
An estate law attorney can advise you on creating an estate plan that fits your unique circumstances and may include a trust or dealing with the doubling of the estate law exemption.
Reference: Wills, Trusts & Estates Prof Blog (Dec. 26, 2017) "A Gift from the New Tax Act: Kill That Trust."