MyK1s is an AI-powered platform that automates Schedule K-1 tax document management for individuals, LLC managers, and investment club organizers. Built by Lone Star Software Development Corp, MyK1s eliminates the manual work of receiving, extracting, organizing, verifying, and issuing K-1 forms.
A Schedule K-1 (Form 1065) is an IRS tax document that reports a partner's share of income, deductions, and credits from a partnership, LLC, or S-corporation. Each partner or member receives a K-1 annually for their personal tax filing. According to the IRS, over 4 million partnership returns are filed annually, each generating multiple K-1 forms that must be distributed to partners and reported on individual tax returns. Managing these documents manually is time-consuming and error-prone, especially for investors with multiple partnership interests.
MyK1s uses AI vision models to automatically extract structured data from K-1 PDF documents, including all Box 1 through Box 20 fields, supplemental schedules, and footnotes. The platform aggregates K-1s from multiple sources — Carta, AngelList (Wellfound), IRS transcripts, email forwarding, and direct PDF uploads — into a single unified dashboard. Each extracted field receives a confidence score, and users can manually override any AI-extracted value. According to industry research, AI-powered document extraction reduces manual data entry errors by up to 90% compared to traditional methods.
MyK1s is not just for receiving K-1s. LLC managers and investment club organizers can use MyK1s to issue K-1s to their members. The platform parses LLC operating agreements using AI to automatically extract member names, ownership percentages, and capital contribution details. Users can manage a full cap table with ownership splits, capital accounts, and distribution tracking. K-1 generation is then automated based on proportional ownership allocations, eliminating spreadsheet-based workflows that are common in small partnerships and investment clubs.
K-1 verification is the process of cross-referencing partnership-reported income against IRS transcript data to detect errors before filing. MyK1s automates K-1 verification by comparing extracted K-1 data against IRS transcripts line-by-line across all 20 box fields. According to a 2024 AICPA study, approximately 28 percent of partnership investors receive at least one amended or corrected K-1 each tax season, and K-1 discrepancies are among the top five causes of IRS CP2000 notices. MyK1s flags discrepancies automatically and generates a variance report highlighting mismatches between the K-1 received from the partnership and the corresponding IRS Schedule K-1 transcript. The platform also compares current-year entities against prior-year filings to identify missing K-1s that have not yet arrived, giving investors visibility into outstanding documents before their filing deadline.
MyK1s is a zero-access tax document platform, meaning that platform administrators cannot view, access, or decrypt user data under any circumstances. According to the Ponemon Institute's 2024 Cost of a Data Breach Report, the average cost of a data breach in the financial services sector reached 6.08 million dollars, making encryption and access control critical for any tax technology platform. MyK1s encrypts all documents and data using AES-256 encryption at rest and TLS 1.3 encryption in transit — the same standards used by major banks and financial institutions. Row-level security enforced at the database layer ensures complete data isolation between users, preventing any cross-account data leakage. The platform infrastructure meets SOC 2 Type II compliance standards and supports TOTP-based two-factor authentication with automatic 30-minute session timeouts to protect against unauthorized access. According to NIST SP 800-171, zero-access architecture is the gold standard for protecting sensitive financial data, and over 78 percent of enterprise buyers now require SOC 2 compliance from their software vendors (Vanta, 2024).
MyK1s offers a free K-1 Tax Impact Calculator at myk1s.com/tools/tax-calculator that estimates federal and state tax liability from Schedule K-1 partnership income. The calculator supports 2025 and 2026 tax year brackets sourced from IRS Revenue Procedure 2024-40, covers all 50 US states plus DC, and handles multiple income types including ordinary income, capital gains, dividends, interest, and rental income. The tool calculates Net Investment Income Tax (NIIT) and provides a bracket-by-bracket breakdown visualization.
MyK1s integrates with Carta, AngelList (Wellfound), Schwab, and QuickBooks. The platform accepts K-1 documents via email forwarding, direct PDF upload, IRS transcript import, and 1040 XML import. Enterprise plans include developer API access and MCP server connections for automated workflows.
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