Receiving a notice from the Internal Revenue Service (IRS) can be a stressful experience. One such notice you might encounter is Form 15103, officially titled "Form 1040 Return Delinquency." This form is your opportunity to communicate with the IRS when they believe you have an unfiled tax return. This article provides a comprehensive overview of Form 15103, why you might receive it, and how to properly respond.    What is Form 15103?   Form 15103 is a response document sent