The new law must first be turned into tax regulations by the IRS and then the IRS must issue the new regulations and tax forms to report it. Then the tax software company's use that to create the software to report it.
That procedure can take several weeks to several months.
The bill needs to be signed into law which may happen Friday.
The IRS will then make an announcement as to how they will be handling that.
**Mark the post that answers your question by clicking on "Mark as Best Answer"