How to create a new project on Bill pay calculator using C++??

So here's the project description.

So,I m a clint and I want a application

i.e (PAY-BILL CALCULATOR)

I run a manufacturing company Name cabcon india limited. I have classified my executive into four level for the benefit of certain perks.

The level and correspondence peaks are shown below in pictures. My executive gross salary includes basic pay, house rent allowance at 25% of basic pay and other peaks maintained in the above picture ☝️.

Income tax is withheld from the salary on a percentage basis as follows in the picture👇👇.My executive gross salary includes basic pay, house rent allowance at 25% of basic pay and other peaks maintained in the above picture ☝️.

Income tax is withheld from the salary on a percentage basis as follows in the picture. 👇

Please make a application or program for Me that will read my executive job number, level no, basic pay and then compute the net salary after withholding income tax.