2024 26 CFR 1.274-5A – Substantiation requirements

2023 26 CFR 1.274-5A – Substantiation requirements

2022 26 CFR 1.274-5A – Substantiation requirements

2021 26 CFR 1.274-5A – Substantiation requirements

2015 26 CFR 1.274-5A – Substantiation requirements

2014 26 CFR 1.274-5A – Substantiation requirements

2010 26 CFR 1.274-5A – Substantiation requirements

2009 26 CFR 1.274-5A – Substantiation requirements.