Except in the case of fraud, intent to evade this part or authorized rules and regulations, or failure to make a return every notice of a deficiency determination shall be mailed within three years after the last day of the second calendar month following the month for which the amount is proposed to be determined or within three years after the return is filed, whichever period expires the later. In the case of failure to make a return, every notice of determination shall be mailed within eight years after the last day of the second calendar month following the month for which the amount is proposed to be determined.