Amounts included in calculation annuity fund deduction

I am retired and receive a monthly pension which is subject to tax. I make no contributions to a pension fund since I retired. I still contribute to a retirement annuity fund monthly. Do I include the total pension received together with investment tax returns for the year to determine the maximum amount allowed for annuity fund deduction

Yes, you will qualify for a tax deduction of up to 27,5% of your taxable income (to a maximum of R350,000 per year) limited to your contributions made.
Taxable income would include your investment tax returns and monthly net pension (i.e. after tax).

thanks thats very helpful

Only a pleasure!