Get Answers Support Form 8868 General Can I fill out the 8868 extension form before the tax year closes? 71 views | Last modified 4/3/2024 8:54:45 AM EST | No. Form 8868 can only be filed after the completion of your organization’s accounting period. Was this helpful? Yes No Couldn't find what youare looking for? Contact Us (704) 839-2321 [email protected]