Tax990 Knowledge Base Have questions? We've got you covered! Get Answers Support Form 990-T Form 3468 Can a nonprofit carry forward or carry back unused investment credits to future tax years? Yes, unused credits can be carried forward for up to 20 years or carried back one year, subject to IRS limitations. Was this helpful? Yes No Need more help? Get in touch with our dedicated support team Contact Us (704) 839-2321 [email protected]