Common Errors of Business Taxpayers Certain errors will cause a return to be sent back to the taxpayer for either correction or additional information. Such a return is not considered filed until it is corrected and resubmitted to the Office of Tax and Revenue. A late filing penalty and interest may be assessed if the return is not received by the due date. (The District of Columbia allows a 10-day grace period in which to "re-file" the corrected return.) Many errors, while not serious enough to cause a return to be sent back, will delay processing and the issuance of any refund. Please read the helpful tips below to avoid common errors when preparing and filing your business tax return. If you have questions, feel free to call or visit our Customer Service Center for additional assistance. Some errors to be aware of on: Business Franchise Tax Returns Personal Property Tax Returns Real Property Tax Returns Sales and Use Tax Returns