
Before submitting a return, ensure all information is accurate and complete. Below is a quick checklist to help customers avoid common filing mistakes that cause delays in processing time.
• First, check to ensure the return submitted is correct and current or a DOR certified online vendor is used. Most tax forms change every year as a result of legislation or policy updates, therefore, using outdated forms or non-certified software will delay return processing.
•Second, check to ensure everything within the return is complete and a signature is included where required.
•Next, provide all necessary documentation with the return. Do not staple or paperclip any documentation or checks to the return if sending in a paper copy.
•Finish by sending in all materials to the right location: Indiana state returns go to DOR and federal returns to the IRS.



