Turbotax Rejects Date in TXF import

I tried to import a TXF file containing capital gains transactions that was exported from Quicken 2020.   TurboTax 2020 rejected every date in the file.  Any help with where to look for answers or how to report the problem?  Here's a typical transaction from the TXF file.  I can't see anything wrong with the dates.

TD
N321
C1
L1
P100.000 BRISTOL-MYERS SQUIB
D2019-11-21
D2020-03-17
$9999.99
$8888.88