Dear [Tax Authority], I am writing to request a supplemental tax return for the state of Wyoming. As a resident of Wyoming, it is important for me to ensure that my tax information is accurate and up-to-date. I have recently discovered some additional income and deductions that were not included in my original tax return, and I am eager to correct this error. I understand that filling out a supplementary tax return can be a complex process, and I want to make sure that I provide you with all the necessary information. Below, I have outlined the key details regarding my supplemental tax return for your convenience: 1. Name: [Your Full Name] 2. Social Security Number: [Your SSN] 3. Address: [Your Full Address] 4. Tax Year: [The Year for Which the Supplemental Return is Filed] Additional Income: I have identified an additional source of income that was not previously reported on my initial tax return. The income details are as follows: — Description of income: [Provide a detailed description of the additional income] — Amount of income: [Specify the exact amount of the additional income] Deductions: I have also discovered some deductions that were not accounted for in my original tax return. These deductions are valid and can offset my taxable income. The deduction details are as follows: — Description of deduction: [Describe each deduction item separately] — Amount of deduction: [Specify the exact amount of each deduction] I have attached all the supporting documents necessary to validate the information provided above, including income statements, receipts, and any other relevant evidence. I kindly request you to review these documents carefully when processing my supplemental tax return. If there are any further steps I need to undertake or any additional forms I need to fill out, please notify me as soon as possible. I am committed to promptly providing any required information to address this matter efficiently. Thank you for your attention to this matter. I apologize for any inconvenience caused by this late notification, and I assure you that it was unintentional. I appreciate your understanding and cooperation, and I look forward to your prompt response. Sincerely, [Your Name] [Your Contact Information]