Pictured is an example of a blank Form 4466, Corporation Application for Quick Refund of Overpayment of Estimated Tax, processed with Document Code 45. Added to the blank form are the Section 01 Alpha Field Designators (AFD) that are used in the revenue receipt program to process this form. The AFDs listed are: 01NC, Name Control.01TIN, Taxpayer Identification Number.01TXP, Tax Period.01MFT, MFT Code.01TDT, Transaction Date.01TC, Primary Transaction Code.01TA>, Primary Transaction Amount (C/Gen, Non-Correctable)