[Your Name] [Your Address] [City, State ZIP] [Email Address] [Phone Number] [Date] [Name of Tax Office] [Address] [City, State ZIP] Subject: Sample Letter for Tax Return Supplement — Allegheny Pennsylvania Dear [Name of Tax Office], I am writing to submit additional information for my tax return filed for the tax year [Year]. I am a resident of Allegheny County, Pennsylvania, and I have recently noticed an error and discrepancy in my tax return. I would like to supplement my original tax filing with the following information to correct this error. 1. Missing Income Information: I have identified an omission of income in my original tax return. Please find attached a copy of the missing Form W-2/1099, which was inadvertently left out during the original filing. This additional income should be included in my tax return, and I have recalculated my tax liability accordingly. 2. Deductions and Credits: Upon reviewing my original tax return, I have realized that I failed to claim certain deductions and credits that I am eligible for. In an effort to correct this oversight, I have enclosed the relevant documentation supporting my claims for deductions related to [specify nature of deductions] and credits such as the [mention specific credits]. 3. Change of Address: I have moved to a new address as of [Date]. Kindly update my contact information to the following: New Address: [Your New Address] [City, State ZIP] Please acknowledge this change and ensure that all future correspondence is sent to the updated address. I apologize for any inconvenience caused by these oversights, and I appreciate your understanding and assistance in rectifying them. If you require any further information or additional documentation, please do not hesitate to contact me at [Phone Number] or [Email Address]. Thank you for your prompt attention to this matter. I look forward to your timely response and resolution. Sincerely, [Your Name]