Which are the most important dates in the tax year?

The most important dates in the tax year are the following:

Jan 31st:

• Deadline for online submission of Self Assessment tax returns for tax year ended 5 April 2016.
• Deadline for paying Self Assessment ‘balancing payments’ for tax year ended 5 April 2016.
• Deadline for first Self Assessment payment on account for tax year ended 5 April 2016.

5th April:

• End of tax year.

6th April:

• First day of the new tax year.

31st July:

• Deadline for second Self Assessment payment account for previous tax year.