Form 2553 for an existing S-Corp

Our company has been an S-Corp since 1994.  Why is TurboTax Business having us fill out Form 2553?  Looking at the IRS instructions for Form 2553 shows it only applies to corporations or entities electing to become an S-Corp.  We have used TurboTax Business since 2000 and this is the first time we have been asked to do this.