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Income Taxes
 6 Months Ended
Sep. 30, 2024
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
The Company’s effective income tax rates were 24.0% and 24.4% for the three months ended September 30, 2024 and 2023, respectively, and 23.7% and 22.2% for the six months ended September 30, 2024 and 2023, respectively. Our effective tax rates for these periods differ from the federal statutory rate of 21.0% primarily due to the inclusion of state and foreign income taxes and permanent rate differences, which are predominantly related to certain executive compensation and the accrual of reserves for uncertain tax positions, offset by research and development tax credits, excess tax benefits for employee share-based compensation, and the Foreign Derived Intangible Income deduction.
As of September 30, 2024 and March 31, 2024 the Company recorded $126.9 million and $115.4 million, respectively, of reserves for uncertain tax positions primarily related to research and development tax credits.
As of September 30, 2024 and March 31, 2024, the Company has recorded both a current income tax receivable (classified as prepaid expenses and other current assets) and a current income tax payable (classified as other current liabilities) on its condensed consolidated balance sheet. These amounts are reflective of fiscal 2025 and 2024 tax accruals in each U.S. Federal, state, and foreign jurisdiction, as adjusted for estimated payments made to date. In addition, as of September 30, 2024 and March 31, 2024, the Company has recorded a long-term income tax receivable of $152.5 million, which represents the amended U.S. federal return refund claims for research and development tax credits and the carryback claim for the fiscal 2021 net operating loss which is classified as other long-term assets on the condensed consolidated balance sheet. The Company is currently under federal audit by the IRS for fiscal years 2016, 2017, and 2019-2021 and the receipt of our U.S federal return refund claims is contingent upon the completion of the ongoing IRS audits.