Interactive field guide
Schedule K-1 Guide
Compare the four K-1 versions and select a field to see what it means. Explore explanations for partners, shareholders, and beneficiaries.
Explore the K-1 tool →Tax Guidance Tools
Explore interactive tax-form explanations and practical guides for business owners. Choose a resource below to get started.
Tax Guidance Tools & Guides
Understand a tax form, find the right instructions, or check where to look for your business tax ID. Start with the resource that matches your question.
Tax form guide
Form 2553 Instructions
Learn how the S corporation election works, review the form instructions, and find filing information and links to IRS resources.
Read the Form 2553 guide →Business tax ID guide
Find Your EIN
Work through the records and official resources that can help you locate a business EIN. This guide explains where to look; it does not search private tax records.
Read the EIN lookup guide →These resources provide general education, not tax advice or tax filing services.