CSG deductible

Hi, have been very efficient and already done my tax return (on the basis that I knew I would be due a refund) but today I received an attestation from RSI telling me the amount of CSG to deduct. The problem is that I don't know where to deduct it from, is it from my total net CA? Any clues anyone, I am an entreprise independant, regime reel. Thank you.

Thats kind Alex but I eventually found the answer from my accountant. In case anyone else would like to know apparently the accountant already had the figure and said it was annoying that the RSI send these declarations as they are of no use to anyone! Am changing accountants in September :-)