Sample Letter for Tax Return for Supplement in Iowa: [Your Name] [Your Address] [City, State, ZIP Code] [Email Address] [Phone Number] [Date] Iowa Department of Revenue [Address] [City, State, ZIP Code] Re: Request for Supplemental Tax Return Information Dear Iowa Department of Revenue, I have recently filed my tax return for the tax year [insert tax year] and have realized that certain information was inadvertently omitted or needs to be corrected. To rectify this, I am submitting this supplemental letter to provide the required details and ensure accurate reporting. Enclosed with this letter, please find the necessary supporting documents and additional information to support the adjustments made. The adjustments made on this supplemental return are as follows: 1. [Description of adjustment 1] — [Explanation of why this adjustment is necessary] — [Supporting documentation 1] 2. [Description of adjustment 2] — [Explanation of why this adjustment is necessary] — [Supporting documentation 2] 3. [Description of adjustment 3] — [Explanation of why this adjustment is necessary] — [Supporting documentation 3] I understand that these adjustments may impact my tax liability, deductions, or credits in Iowa. Therefore, I kindly request that you process this supplemental return as soon as possible to ensure accurate taxation of my income. If there are any questions or further information required regarding this supplemental return, please do not hesitate to contact me at the provided phone number or email address. I am more than willing to provide any additional evidence or answer any queries that arise during the review process. I apologize for any inconvenience caused by this oversight and appreciate your understanding and cooperation in addressing this matter promptly. Thank you for your attention to this request. Sincerely, [Your Name]