I think that it does matter. This discussion references the desktop version.
Putting this in context, @msromike reports that starting a fresh return prevents the errant entry on Form 8915-F Line C.
My speculation is that when I filled out the section of TurboTax for the Disaster Distribution / CARES Act from 2020, I entered "COVID-19" as a response to one of the questions. Remember that I did this BEFORE the March 9th release that allowed us all to file.
Other users report the "Line C should be blank" problem, but have reported an entry in that field like "Coronavirus". Perhaps they also filled out the form prior to the March 9th release.
TurboTax should clear out the entry on Line C when the box nearby (sorry, don't remember the prompt) is checked.
There is a workaround discussed earlier to open the Forms worksheet for 8915-F. It seems that another solution is to restart your return from scratch.
Those filing after March 9th and have not filled out the form prior seem to be immune to the error.
Good fortune to all in your filing adventures.
