Problem with the commission calculation

Hi to all of you, I need your help on this, The commissión for the products are in 8.5%, when an product is sold the details of the transaction can see like in the next image, the problem here is that I don´t knon why there is another tax (the orange square) I have´t set up any other tax for commission or something like that, can you please help me?

Can you please see this image here https://drive.google.com/file/d/1Bxclu1UXA7AY9e04_SxkrwI69FZt9wEr/view?usp=sharing

thank you