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Taxes (Details 1) - USD ($) | Mar. 31, 2020 | Mar. 31, 2019
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Income Tax Disclosure [Abstract] |  |
Allowance for doubtful accounts | $ 113,062 | $ 129,742
Deferred revenue | 219,177 | 83,876
Net operating loss carry-forwards | 465,059 | 402,876
Total deferred tax asset | 797,298 | 616,494
Valuation allowance | (525,183) | (213,028)
Deferred tax assets, net | $ 272,115 | $ 403,466

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