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Income Taxes
6 Months Ended
Dec. 31, 2021
Income Taxes  
Income Taxes

10. Income Taxes

The determination of the annual effective tax rate is based upon a number of significant estimates and judgments, including the estimated annual pretax income in each tax jurisdiction in which we operate and the development of tax planning strategies during the year. In addition, as a global commercial enterprise, our tax expense can be impacted by changes in tax rates or laws, the finalization of tax audits and reviews and other factors that cannot be predicted with certainty. As such, there can be significant volatility in interim tax provisions.

The effective tax rates for the three months ended December 31, 2021 and 2020 were 26.3% and 28.6%, respectively. During each of the three month periods ended December 31, 2021 and 2020, we recognized a net discrete tax expense of $0.3 million related to equity-based compensation under ASU 2016-09 and changes in prior year tax estimates.

The effective tax rate for the six months ended December 31, 2021 and 2020 was 21.6% and 27.7%, respectively. During the six months ended December 31, 2021, we recognized a net discrete tax benefit of $1.8 million related to equity-based compensation under ASU 2016-09 partially offset by a discrete tax expense for changes in prior year tax estimates of $0.2 million. During the six months ended December 31, 2020, we recognized discrete tax expense of $0.1 million related to equity-based compensation under ASU 2016-09 and changes in prior year estimates.