Build me a website

We are making a website TICK-TAX that helps a user to calculate and manage his tax through the website. The things the website does – User login or signin Sets up profile Enter details about total income, property etc through official documents. On the day of payment, the website calculates the tax that is to be paid by the user, according to the documents provided by the user…..and according to the rules setup by govt (like tax rate, or any scheme applicable) The website manages a record of the user, like if he has paid the tax or not. The website provides reminders through a calender function about the dates when he has to pay the tax. The website after a successful payment of tax … pick a random gift from the list for the user(optional)