The discrepancy seems to be in the "Employee Stock Transaction Worksheet". TurboTax does not populate Line 2 ("Date shares sold") automatically. Once I went into that form and used "Override" (in Edit menu) to enter in the Date Sold on Line 2, the error was resolved for Line 25 Box C.
TurboTax is not really clear what it's looking for when it states the error. Line 25 Box C is actually "Date Vested"; I was assuming it was asking me to input the "Date Sold" in the field when the error was raised (which is incorrect).
