As an employee, should you not be using Form 12?
The AVC are at section 35 of Form 12.
Where on 2007 Form 11 does one enter an AVC (made by Oct 31 2008) to an Occupational Pension scheme. The section on Charges & Deductions only seems to deal with PRSA contributions.
Section 217 (C) on page 9
Note that trade income up to 50k is allowed on the Form 12.