This research aims to determine the effect of knowledge management to improve the total quality in Egyptian Tax Authority, while trying to reach a proposal for knowledge management model leads applied to improve the total quality, and reach a set of results, including: the existence of a significant effect of knowledge management to improve the total quality, as presented a set of recommendations, including: the establishment and create the appropriate infrastructure for knowledge management,

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... e application of the model proposed, which is proven by testing the ground that it would have a clear contribution in the use of knowledge management to improve the total quality in the Taxes