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Income Taxes | 3 Months Ended
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Mar. 31, 2023
Income Taxes [Abstract] |
Income Taxes | 9. Income Taxes Beginning in 2022, the Tax Cuts and Jobs Act of 2017, or TCJA, requires taxpayers to amortize research and development expenditures over five years pursuant to Internal Revenue Code, or IRC, Section 174. Additionally, we expect to reflect the royalty purchase agreement with Royalty Pharma as a taxable sale, requiring us to include the proceeds from the sale, net of currently deductible issuance costs, as taxable income in 2023. We recorded income tax expense of $11.4 million and $1.1 million for the three months ended March 31, 2023 and 2022, respectively. The increase in income tax expense for the three months ended March 31, 2023, compared to the same period in 2022, relates primarily to the impact of the Royalty Pharma transaction.

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