what is fiscal year end date
The tax years you can use are: 1  Calendar year - 12 consecutive months beginning January 1 and ending December 31. 2  Fiscal year - 12 consecutive months ending on the last day of any month except December. A 52-53-week tax year is a fiscal tax year that varies from 52 to 53 weeks but does not have to end on the last day of a month.