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Income Taxes
 6 Months Ended
Sep. 30, 2025
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
The Company’s tax provision for interim periods is determined using an estimate of its annual effective tax rate, adjusted for discrete items, if any. The Company’s effective tax rates for the three and six months ended September 30, 2025 were 14.9% and 15.8%, respectively, and 29.0% and 25.8% for the three and six months ended September 30, 2024, respectively.
The Company's effective tax rate differs from the U.S. federal statutory rate, primarily due to stock-based compensation related tax benefits, which are subject to limitations for certain executive officers under IRC section 162(m), and federal and state research and development tax credits. The Company’s effective tax rate is based on forecasted annual income before income taxes which may fluctuate through the rest of the year.
In July 2025, Congress passed and the President signed into law H.R. 1, the One Big Beautiful Bill Act ("Tax Act") which addresses certain business tax provisions enacted as a part of the 2017 Tax Cuts and Jobs Act including restoration of Section 174 expensing for US-based research. Accounting Standards Codification Topic 740, Income Taxes, (“Topic 740”) requires the tax impacts to be included in the reporting period that includes the date the Tax Act was signed into law. The impacts of the Tax Act are reflected in our results for the fiscal quarter ended September 30, 2025, and there was no material impact to our income tax expense or effective tax rate. Management elected to accelerate the deduction of all remaining unamortized domestic R&D expenses originally capitalized in fiscal years 2023 through 2025 in one year—i.e., in fiscal year 2026. The net deductions benefit increased the Company’s September 30, 2025 prepaid taxes and decreased our deferred tax assets by approximately $40.4 million.