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Taxes (Details) - Schedule of deferred tax assets and liabilities - USD ($)	Mar. 31, 2021	Mar. 31, 2020
Schedule of deferred tax assets and liabilities [Abstract]
Allowance for doubtful accounts	$ 139,048	$ 113,062
Deferred revenue	546,043	219,177
Net operating loss carry-forwards	2,462	465,059
Total deferred tax asset	687,553	797,298
Valuation allowance	(48,284)	(525,183)
Deferred tax assets, net	$ 639,269	$ 272,115

X

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred income.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 8
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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

+ References

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-Publisher FASB
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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary difference from allowance for credit loss on financing receivable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

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