Latest SARS definitions of source codes 3610 and 4006:
Code 3610: An annuity paid on a regular basis by a retirement annuity fund and/or a compulsory purchased annuity purchased from a long-term insurer and paid on a regular basis.
Code 4006: Total retirement annuity fund contributions paid or ‘deemed paid’ by employee.
Code 3610 is therefore an income code and code 4006 is a deduction code. Code 3610 can therefore not be included in code 4006. As per SARS Section 10C, the value in code 4006 is used to offset income as stated in code 3610, thereby generating tax free retirement and/or compulsory annuity income to the value of what is stated in code 4006 (RA contributions paid in the present tax year or brought forward from previous tax years)

. If the value under 4006 is greater than that in 3610, then the excess is carried forward to the next tax year (assuming that there is no other income other than that under code 3610).