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INCOME TAX EXPENSE
9 Months Ended
Jun. 30, 2021
INCOME TAX EXPENSE  
INCOME TAX EXPENSE

8.  INCOME TAX EXPENSE

The third quarter 2021 effective income tax rate was 21.3% compared to 14.3% in the third quarter of 2020. The effective income tax rate from continuing operations in the first nine months of 2021 was 22.5% compared to 15.9% in the first nine months of 2020. The income tax expense in the third quarter and first nine months of 2021 was favorably impacted by a tax return to provision true-up to foreign derived intangible income and other 2020 true-ups decreasing the third quarter and year-to-date effective tax rate by 3.9% and 1.2%, respectively.

The income tax expense in the third quarter and first nine months of 2020 was favorably impacted mainly by the following items: 1) an increase in the available 2019 foreign tax credit which was attributable to new information and tax planning strategies reducing the third quarter effective tax rate and year-to-date effective tax rate by 3.3% and 1.3%; and 2) new information and tax planning strategies resulted in an increase in the 2020 foreign tax credit and the catch-up of the benefit which reduced the 2020 third quarter effective tax rate by 2.5%. The year-to-date 2020 effective tax rate was favorably impacted by the release of a valuation allowance of $2.8 million for foreign net operating losses decreasing the year-to-date 2020 effective tax rate by 5.1%.