This research were done due to a lot of people has already implemented subjective and abjective requirements for the tax, but they didn’t go to tax office to get the Identity Tax Registration Number. More people who had registered, it would increase the income tax by qualified that all of tax payer doing their tax duty bassed on tax laws. Therefore it is necessary to arrange extensification activities in purpose to increase the income tax revenue also to find out the effectiveness of that activities. The result of this research showed that the activities was very effective to increase the registered taxpayers each year. Concide with increasing the registered taxpayers each year, so the incoming tax realization about to increase from 2009 until 2013 as well. Bassed on the realization of income tax revenue, so the effectivity can be determined by comparing the incoming tax realization between the target of it. The level of income tax in KPP Pratama Malang Utara is effective from 2009 until 2013. Keyword: Income Tax Revenue, registered taxpayers, potencial of taxation
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