Issue with Invoice an advance payment

Hello everyone
I have such problem (by steps):

  1. I’ve created a Sale quotation that Advance payment needed (including taxes):
  2. After that I’ve created an advance payment invoice with these conditions:
  3. But in the next window Axelor shows me this:

How can I avoid this situation? Or I need to input amount in the step 2 without taxes? If so, is there a way to change it, that user can input only payment amount (50% and did not think about calculating taxes)?