Sir: According to a news item, only Rs 4 billion are collected every year from property deals amounting Rs 7000 billion. This only proves the scale of tax evasion in the property sector. This amount probably does not include thousands of property transactions in Karachi’s Bahria Town, which reportedly has yet to be registered with the government for tax to be recovered. The tax authorities should investigate the matter. SHAKIR LAKHANI Karachi