After Vodafone, the tax department is focusing its attention on Hong Kong-based Hutchison Whampoa, which sold its 67% stake in the Indian telecom venture to the British giant for $11.5 billion. Sources said the department, which is almost ready to raise a demand for payment of Rs 13,000 crore tax and interest from Vodafone as soon as the Finance Bill gets presidential nod, will also serve a notice on Hutch, which does not have a presence in India after exiting the telecom venture.