When I enter Adjusted cost basis from ETrade, should I also check 1099-B reports incorrect cost basis?

Dear experts,

I have a Supplemental form from ETrade, which has 2 columns for each RSU sale: Adjusted Cost Basis and Cost Basis. 

Question 1) Should I use Cost Basis (reported in 1099-B) or Adjusted cost basis ?

I am using TT Premier which takes "Cost Basis" by default. So I tried to correct it to enter "Adjusted Cost Basis". I edit each entry -> "Guide me step by step "-> .. "Tell me a bit more about this sale" -> Changed Cost basis number to Adjusted cost basis.

Question 2) Should I also choose "My Form 1099-B reports incorrect cost basis" for it to take effect? Because if I don't choose this, the cost basis is being taken in calculations.

Thanks so much for your advice!