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Income Taxes
6 Months Ended
Mar. 31, 2021
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
The calculation of the effective tax rate is as follows (in thousands):
 Three months ended March 31,Six months ended March 31,
 2021202020212020
Income (loss) before income taxes$(1,171)$9,555 $(1,430)$12,888 
Income tax provision (benefit)(946)2,134 (841)2,692 
Net income (loss)$(225)$7,421 $(589)$10,196 
Effective tax rate81 %22 %59 %21 %
 
Our income tax provision (benefit) reflects an effective tax rate on pre-tax income (loss) of 81% for the second quarter of Fiscal 2021 compared to 22% for the second quarter of Fiscal 2020. For the three and six months ended March 31, 2021, the income tax benefit largely resulted from the relative amounts of income/loss recognized in various tax jurisdictions, the utilization of net operating loss carryforwards in Canada that have been fully reserved with a valuation allowance, and the estimated Research and Development Tax Credit (R&D Tax Credit).

The effective tax rate for the three and six months ended March 31, 2020 was favorably impacted by the R&D Tax Credit as well as the projected utilization of net operating loss carryforwards in Canada that were fully reserved with a valuation allowance. These favorable impacts were offset by the valuation allowance recorded against our UK deferred tax assets as a discrete item during the second quarter of Fiscal 2020.