2024 26 CFR 1.41-6 – Aggregation of expenditures

2023 26 CFR 1.41-6 – Aggregation of expenditures

2022 26 CFR 1.41-6 – Aggregation of expenditures

2021 26 CFR 1.41-6 – Aggregation of expenditures

2020 26 CFR 1.41-6 – Aggregation of expenditures

2019 26 CFR 1.41-6 – Aggregation of expenditures

2016 26 CFR 1.41-6 – Aggregation of expenditures

2015 26 CFR 1.41-6 – Aggregation of expenditures

2014 26 CFR 1.41-6 – Aggregation of expenditures

2010 26 CFR 1.41-6 – Aggregation of expenditures

2009 26 CFR 1.41-6 – Aggregation of expenditures