That is very disappointing news. Turbotax obviously does not understand the significance of this issue to individual tax filers. It almost certainly affects the majority of shareholders in S corporations. It's the individual Form 1040 filers that have the Form 7203 filing requirement, not the S corporations themselves. So the affected 1040 Turbotax user group is significant.
The IRS appears to be aware of this issue with respect to farmers and fishermen first because of the unique March 1st filing deadline they have in some situations. Here's the IRS news release. Perhaps they will extend it to all Form 7203 filers but that's not clear.
https://www.irs.gov/newsroom/irs-update-regarding-recent-electronic-filing-challenges-in-connection-...
