I have $773 due in self-employment social security tax. According to IRS, half must be paid this year. But TurboTax says 0 this year, full amount next. Is it correct?

I couldn't find any amount limits or thresholds on the IRS website.  IRS says pay half by the end of this year, and the 2nd half by the end of next year.  I've redone the section in TurboTax to make sure, it is definitely says $0 due by 12/31/21, and the full $773 due by 12/31/22.  What am I missing?