Income tax expense during interim periods is based on an estimated annual effective income tax rate, plus any significant unusual or infrequently occurring items recorded in interim periods. The computation of the annual estimated effective income tax rate at each interim period requires certain estimates and judgment including, but not  limited to, the expected operating income for the year, projections of the proportion of income earned and taxed in various jurisdictions, permanent and temporary differences, and the likelihood of recovering deferred tax assets generated in the current year.

Uncertain Tax Provisions