My 1099B contains a wash sale that needs elimination (to claim a loss from the sale of security). How can I achieve this? Unchecking the checkbox with a wash sale not wor

[RobertB4444]

You will need to enter the data yourself and remove the imported data.  Delete that transaction and then type it in yourself.  The import feature is designed to follow the instructions from the financial institution that it imported the data from.

@massachu 

[Mike9241]

why are you eliminating this wash sale? your broker reported this to the IRS and it looks to see that this is reported on your return. you can expect an inquiry, notice or even a change to your return when there is this mismatch. 

[fanfare]

disallowed loss is transferred to the triggering shares that caused the wash sale via basis adjustment

Assuming no other considerations, when you sell those shares the loss will be deducted due to the basis adjustment.

Your broker is required by IRS to track all this for you ; it is on your consolidated 1099-B.

@massachu