Are you allowed to turn right without stopping in this situation?

Why?

The B-20 stop sign on the right requires a complete stop before entering the priority road. This also applies when turning right, even if the road is clear. After stopping, you must give way to vehicles travelling along that road.

§ 21 ust. 1 i 2 rozporządzenia w sprawie znaków i sygnałów drogowych