How do I change a "Detail" entered in the "Federal Review" ?

Can you please clarify which part you need to change?

I have entered some information into the "Federal Review", sales transactions of Crypto and now I need to amend the entries, ie Purchase date, purchase price, etc.  Is it possible to amend these entries?  If so, please advise.

Yes, in Federal Review the big pane at the bottom is for context and the only changes can be made in the pane at the top. However, if you have multiple corrections, you can return to that section of the return in Wages and Income, then scroll down to Investments and Savings and click on Show More, then Revisit for Stocks, Cryptocurrency, Mutual Funds, Bonds, Other (1099-B).

Thanks TeresaM.