In August 2018, the IRS published the proposed regulations with respect to the additional first-year depreciation deduction to 100% of the basis.

The proposed regulations provide guidance on this generally welcomed provision by most of the business owners.

The effective date of the new provision is for assets placed in service after September 27, 2017.

Source:

https://www.federalregister.gov/documents/2018/08/08/2018-16716/additional-first-year-depreciation-deduction