TurboTax Premier: 1099B entering cost basis from 0 to actual amount increased Fed Tax, putting back to 0, increased Fed Tax even more!

I am in the process of preparing 2020 Tax Return in TurboTax Premier on Mac.

 

The last thing I did was import my ETrade 1099Bs.

My fed tax due increased 4x which is not unreasonable as I sold individual stocks as well as some company benefit stock due to Covid, as well as the following issue...

 

Etrade does not enter a cost basis for the company stock sold. So I need to use the "getSupplementaryInformation" for those sales to enter the cost basis.

 

I chose the largest sale, and entered the cost basis expecting the fed tax to go down. I clicked "Next" and it actually went up slightly.

 

So I thought that seems weird. Let's start over. So I hit the back button, and changed the value back to 0, and hit Next, this time the fed tax went up a lot, like 50% increase. So I completely backed out of the form entry and quit the app, with it still showing the 50% increase in fed tax.

 

I relaunched and it still shows the 50% increase.

 

This seems like a bug and that I cannot trust whatever calculations are going on inside TurboTax.

 

I'm now thinking that it might be worth paying another $50 or whatever for a competing product so that I have two sources to compare what is going on.