What is the changes made to the singapore incometax?

In the budget 2007,state what was all the changes made to the income tax

Read this article about ur topic:

Individual income tax in Singapore forms part of two main sources of Income tax, the other being corporate taxes on companies. Payable on an annual bases, it is currently based on the progressive tax system (for local residents), with taxes ranging from 0% to 20% since Year of Assessment 2007. The Year of Assessment (YA) is based on the calendar year commencing 1 January to 31 December, and is payable on a preceding year basis, whereby taxes payable per year of assessment is based on income earned in the preceding calendar year.

Taxation is based on the source principle, in which only income earned at source, in this case in Singapore, or those derived from overseas but received in Singapore, are taxable. Non-residents receiving income derived from outside Singapore are therefore not subject to tax. This system, however, has the potential in allowing for tax avoidance practises by individuals who derive income from abroad, gain tax exemptions via their non-resident status there, and utilising this income outside Singapore.