The Company files income tax returns in the United States federal jurisdiction and various state and foreign jurisdictions. The Company is no longer subject to United States federal and state and non-United States income tax examinations by tax authorities for years before 2009.

Deferred income taxes are provided for temporary differences between the carrying amounts and tax basis of assets and liabilities. Deferred taxes are classified as current or noncurrent based on the financial statement classification of the related asset or liability giving rise to the temporary difference. For those deferred tax assets or liabilities (such as the tax effect of the net operating loss carryforwards) which do not relate to a financial statement asset or liability, the classification is based on the expected reversal date of the temporary difference.

The income tax provision (benefit) from continuing operations consists of the following at December 31, 2017 and 2016:

On December 22, 2017, H.R. 1, commonly known as the Tax Cuts and Jobs Act (the “Act”) was signed into law. The Act reduced the Company’s corporate federal tax rate from 35% to 21% effective January 1, 2018 and changed certain other provisions. As a result, the Company is required to re-measure the deferred tax assets and liabilities using the enacted rate at which they expect them to be recovered or settled. The effect of this re-measurement is recorded to income tax expense in the year the tax law is enacted. For 2017, the re-measurement of our net deferred tax asset resulted in a $11.1 million adjustment to the income tax provision (benefit) at December 31, 2017.

The income tax provision (benefit) amounts differ from the amounts computed by applying the United States federal statutory income tax rate of 21% for the year ended December 31, 2017 and 35% for the year ended December 31, 2016 to pretax income (loss) from continuing operations as a result of the following for the years ended December 31, 2017 and 2016:

The tax effects of temporary differences that give rise to the deferred tax assets at December 31, 2017 and 2016 are as follows:

The Company’s ability to use its net operating loss carryforwards could be limited and subject to annual limitations. In connection with future offerings, the Company may realize a “more than 50% change in ownership” which could further limit its ability to use its net operating loss carryforwards accumulated to date to reduce future taxable income and tax liabilities. Additionally, because United States tax laws limit the time during which net operating loss carryforwards may be applied against future taxable income and tax liabilities, the Company may not be able to take advantage of all or portions of its net operating loss carryforwards for federal income tax purposes.

The federal net operating loss carryforwards at December 31, 2017 will begin to expire in 2025.