This field has the Decrease value with Conditional or Unconditional classification in the sending of data in F100 block of SPED PIS/COFINS.
This field content is filled out with the standard value (Conditional), you can edit for U (Unconditional), if you need it.
If in a bill receivable addition, it is classified as Discount F100 = U (Unconditional), the decrease value is subtracted from the base value for calculation and the record related to the discount value is not sent in F100 block of SPED PIS/COFINS.