Per another thread (RE: Turbotax 2019 for Mac crashed):
Ran into the identical issue after downloading a $39.99 second state (PA) on Home Business 2019. The software crashed immediately after paying the $19.99 filing fees for the 2 states. After spending 30+ minutes on the phone with the wrong CS agent, I spoke to an agent who was more helpful. She escalated the call to 2nd-level tech support and while they were looking at it provided me with refunds for the earlier purchases. Now working on getting a refund on the original software (Costco).
There appears to be a cached file somewhere within the user profile that is being read on restart. I was able to login as a temp user and start the app; but the alternate user would be required to download/pay that were already installed on the primary user.
