1. Python 3.7 = C:\Users\x\PycharmProjects\Hello\venv\Scripts\python.exe

2. Pip install following:
    a. PyQt5
    b. PyQt5-tools

3. Location of QT designer.exe, which is located in - C:\Users\x\PycharmProjects\Hello\venv\Scripts\designer.exe

4. For QT Designer : File -> Settings -> Tools -> External Tools -> create (+)
    a. Name : QTdesigner
    b. Program : C:\Users\x\PycharmProjects\Hello\venv\Scripts\designer.exe
    c. Arguments : NONE
    d. Working directory : $ProjectFileDir$
    
    OK
    
5. For converting UI file to Py file Pyuic  : File -> Settings -> Tools -> External Tools -> create (+)
    a. Name : PyUIC
    b. Program : C:\Users\x\PycharmProjects\Hello\venv\Scripts\pyuic5.exe
    c. Arguments : -x $FileName$ -o $FileNameWithoutExtension$.py
    d. Working directory : $ProjectFileDir$
    
    OK
    
6. Click Tools -> External Tools -> QTdesigner
    Design your UI and save it as X.ui
    
7. You will have X.ui located in the Project file, 
    a. right click on X.ui
    b. External Tools -> PyUIC
    c. Success 

8. You will be able to see X.py file in the projects folder

9. Run X.py 

10. You should be able to see your GUI Application.