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Income Taxes
3 Months Ended
Feb. 28, 2021
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
Our income tax provision for the first quarter of fiscal years 2021 and 2020 reflects our estimate of the effective tax rates expected to be applicable for the full fiscal years, adjusted for any discrete events, which are recorded in the period in which they occur. The estimates are reevaluated each quarter based on our estimated tax expense for the full fiscal year.

Our effective tax rate was 23% in both the first fiscal quarter of 2021 and in the first fiscal quarter of 2020. There were no significant discrete tax items in either the first fiscal quarter of 2021 or the first fiscal quarter of 2020.

Our federal income tax returns have been examined or are closed by statute for all years prior to fiscal year 2017. Our state income tax returns have been examined or are closed by statute for all years prior to fiscal year 2016.

Tax authorities for certain non-U.S. jurisdictions are also examining returns. With some exceptions, we are generally not subject to tax examinations in non-U.S. jurisdictions for years prior to fiscal year 2014.