2024 26 CFR 1.41-4 – Qualified research for expenditures paid or incurred in taxable years ending on or after December 31, 2003
2023 26 CFR 1.41-4 – Qualified research for expenditures paid or incurred in taxable years ending on or after December 31, 2003
2022 26 CFR 1.41-4 – Qualified research for expenditures paid or incurred in taxable years ending on or after December 31, 2003
2021 26 CFR 1.41-4 – Qualified research for expenditures paid or incurred in taxable years ending on or after December 31, 2003
2020 26 CFR 1.41-4 – Qualified research for expenditures paid or incurred in taxable years ending on or after December 31, 2003
2019 26 CFR 1.41-4 – Qualified research for expenditures paid or incurred in taxable years ending on or after December 31, 2003
2016 26 CFR 1.41-4 – Qualified research for expenditures paid or incurred in taxable years ending on or after December 31, 2003
2015 26 CFR 1.41-4 – Qualified research for expenditures paid or incurred in taxable years ending on or after December 31, 2003
2014 26 CFR 1.41-4 – Qualified research for expenditures paid or incurred in taxable years ending on or after December 31, 2003
2010 26 CFR 1.41-4 – Qualified research for expenditures paid or incurred in taxable years ending on or after December 31, 2003
2009 26 CFR 1.41-4 – Qualified research for expenditures paid or incurred in taxable years ending on or after December 31, 2003.