Investors & landlords

Why does it also say under Select any less common adjustments that apply  

 

(checked) Loss from this sale is disallowed due to wash sale rules

                       Disallowed wash sale amount (leave blank if entire loss is disallowed)  $4

 

If I remove the $4 (leaving blank) it will accept the loss.  By leaving the $4 the loss is disallowed.

 

Confused!