Contribute correction: 1988 belastingprogramma

  _  _      ___     _    _      ___    
 | \| ||   / _ \\  | \  / ||   / _ \\  
 |  ' ||  | / \ || |  \/  ||  / //\ \\ 
 | .  ||  | \_/ || | .  . || |  ___  ||
 |_|\_||   \___//  |_|\/|_|| |_||  |_||
 `-` -`    `---`   `-`  `-`  `-`   `-`