what do i put for box 1e cost basis , inherited this stock 2020 sold some last year

[alpaca cats]

hello , i inherited stock in 2020 and sold some twice in 2022. I had turbo tax auto import from computershare.  turbo tax is asking for box 1e cost basis.. what do i put in here? on the 1099b it was blank. do do i have to figure out the price it was when i inherited the stock or do i leave it at zero? also the sales section was auto selected as unkown term not reported , is that correct or do i need to do longterm not reported (non covered) like the 1099b says?

thank you if u can help me

[Bsch4477]

Duplicate 

[Lbas]

I believe you need to find out what the value was on the date of death.