California K-1 (Form 100S) reports a shareholder's share of an S-corporation's income, deductions, and state adjustments for California tax purposes. These forms often include specific California income items like ordinary business income, net rental real estate income, interest, and dividends, as well as various state-specific adjustments and credits that differ from federal rules. The inconsistent layouts and extensive footnotes across different California K-1 (Form 100S) documents, which vary by preparer and software, significantly hinder the review process for tax professionals. Abacus resolves this by extracting all relevant fields from California K-1 (Form 100S) PDFs and normalizing them into standardized Excel workbooks. This comprehensive process includes meticulous handling of California and federal add-backs, various state tax credits, and detailed ownership information, ensuring a clean and efficient import directly into tax preparation software like CCH or GoSystem.