Get Answers Support Tax Filings & Payments Other Forms Form 1042-S What is income code 30 in form 1042-S? Last modified 2/16/2024 1:58:12 AM EST In Box 1 of the form 1042-S, you need to enter the appropriate income code when filing. If you enter the income code 30, it signifies that your income pertains to the 'Original Issue Discount. Was this helpful? Yes No Need more help? Get in touch with our dedicated support team Contact Us (704) 684-4751 support@taxbandits.com Sign Up for a FREE TaxBandits Account! The Smart CPA Choice Register Now Already have an account? Sign in