It's not anything special about your tax return. Form 1040X for an amended return is not yet available in TurboTax. It is currently expected to be available on March 7. That date is an estimate, not a guarantee, and it could be late in the afternoon Pacific time on March 7. It was originally expected to be available earlier, but the date had to be delayed because there was a delay in the IRS issuing the final instructions for the form. That's why the date changed.