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Income Taxes
6 Months Ended
Jul. 30, 2023
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
Income tax was an expense of $793 million and $958 million for the second quarter and first half of fiscal year 2024, respectively, a benefit of $181 million for the second quarter of fiscal year 2023, and an expense of $6 million for the first half of fiscal year 2023. The income tax as a percentage of income before income tax was an expense of 11.4% and 10.4% for the second quarter and first half of fiscal year 2024, respectively, a benefit of 38.0% for the second quarter of fiscal year 2023, and an expense of 0.3% for the first half of fiscal year 2023.
The increase in the effective tax rate was primarily due to a decreased impact of tax benefits from the foreign-derived intangible income deduction, stock-based compensation, and the U.S. federal research tax credit, relative to the increase in income before income tax.
Our effective tax rates for the first half of fiscal years 2024 and 2023 were lower than the U.S. federal statutory rate of 21% due to tax benefits from the foreign-derived intangible income deduction, stock-based compensation and the U.S. federal research tax credit.
For the first half of fiscal year 2024, there were no material changes to our tax years that remain subject to examination by major tax jurisdictions. We are currently under examination by the Internal Revenue Service for our fiscal years 2018 and 2019. Additionally, there have been no material changes to our unrecognized tax benefits and any related interest or penalties since the fiscal year ended January 29, 2023.
While we believe that we have adequately provided for all uncertain tax positions, or tax positions where we believe it is not more-likely-than-not that the position will be sustained upon review, amounts asserted by tax authorities could be greater or less than our accrued position. Accordingly, our provisions on federal, state and foreign tax related matters to be recorded in the future may change as revised estimates are made or the underlying matters are settled or otherwise resolved with the respective tax authorities. As of July 30, 2023, we do not believe that our estimates, as otherwise provided for, on such tax positions will significantly increase or decrease within the next 12 months.