The app should view personal data plus year & amount for subscription for user.
The year filed is a combo Box where the present and previous years will be displayed, once the user data is called with corresponding value to the filed Amount (text box).
While viewing the personal data of user it should be possible to toggle with the year’s forward and backwards to see the amounts user has paid over the years.
New user with either no history or with some history for earlier years can be added and updated.