Here are good reasons for filing a Form 12 :
"This tax Return should be completed by an individual whose source of income is from a PAYE employment or pension or by a non-proprietary company director who pays all his/her Income Tax under the PAYE system.
NOTICE: YOU ARE HEREBY REQUIRED, UNDER SECTION 879 TAXES CONSOLIDATION ACT 1997, BY THE INSPECTOR OF TAXES NAMED ABOVE TO PREPARE AND DELIVER, ON OR BEFORE 31 OCTOBER 2009, A TAX RETURN ON THIS PRESCRIBED FORM FOR THE YEAR 1 JANUARY 2008 TO 31 DECEMBER 2008." ... from Form 12 2008.
Due to the nature and timing of certain expenses incurred by PAYE workers (refuse charges, medical expenses, etc.) the day-to-day PAYE system as operated by their employer(s) will not necessarily reflect their true tax liability at the end of a tax year.
If a tax-payer needs professional help in completing Form 12, this expense is allowable for tax purposes.