The tax year of any organization will usually be a period of 12 consecutive months.
If your organization follows a Calendar Tax Year, the tax period will be 12 consecutive months starting from January to December.
If your organization follows a Fiscal Tax Year, the tax period can start on any month and run through for 12 consecutive months. But the end date of any Fiscal Tax Year should be the last day of that month except December.
The tax year or accounting period of your organization can be found in: