If you downloaded the 2023 Instructions for Schedule C (Form 1040) prior to January 19, 2024, please note the following reference changes. Page C-7, see chapter 7 of Pub 225, section 57. Page C-8, see chapter 4 of Pub 225, generally. Page C-8, see Pub 551, under Uniform Capitalization Rules. Page C-17, see chapter 8 of Pub 334. Page C-17, see section 181. Page C-17, see chapter 4 of Pub 225.