Tax structure - by: kishorevenki

Hi,

I have couple of queries on the tax structure:

1. How can we customize the tax fields? IN our country there are three parameters for the tax computation?
2. If set the tax structure for the customer,. will it appear in all the financial forms, reports such has quotation, billing, etc.
3. Once set the tax for a customer, can we modify the tax under project level without changing at the customer level?

Thanks & Regards,
Kishore