After you file

I have checked this and verified that TurboTax rounds $1,954.26 to $1,954.  It seems you may have several transactions that sum up to $1,954.26 rather than one.  In this case, since tax returns report rounded numbers, you can either allow this to flow through, or choose the option "The cost basis is incorrect or missing on my 1099‑B", and adjust the cost by $1 to create the expected gain.