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The objective of this paper is to solve the time-fractional Schr(o)dinger and coupled Schr(o)dinger differential equations (TFSE) with appropriate initial conditions by using the Haar wavelet approximation.For the most part,this endeavor is made to enlarge the pertinence of the Haar wavelet method to solve a coupled system of time-fractional partial differential equations.As a general rule,piecewise constant approximation of a function at different resolutions is presentational characteristic of Haar wavelet method through which it converts the differential equation into the Sylvester equation that can be further simplified easily.Study of the TFSE is theoretical and experimental research and it also helps in the development of automation science,physics,and engineering as well.Illustratively,several test problems are discussed to draw an effective conclusion,supported by the graphical and tabulated results of included examples,to reveal the proficiency and adaptability of the method.