Get your taxes done using TurboTax

on 1099-B cost and proceeds should not be negative.

The  wash sale adjustment is positive also.

 

I know some brokers 1099s show negative amounts but I don't think that is correct.

 

if you use aggregation, the subtotals are entered by you and will match your consolidated 1099-B, I hope.

the issue of rounding becomes moot.

 

@brctt1