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Income taxes (Details) - Schedule of Federal Statutory Rate on Income (Loss) before Income Taxes - USD ($)
3 Months Ended 9 Months Ended
Jan. 31, 2024
Jan. 31, 2023
Jan. 31, 2024
Jan. 31, 2023
Schedule of Federal Statutory Rate on Income (Loss) before Income Taxes [Abstract]        
Federal statutory rate expense (benefit) $ (79,149) $ 274,164 $ (9,676) $ 297,661
State statutory rate, net of effect of state income tax deductible to federal income tax (25,658) 92,473 (1,249) 100,952
Permanent difference – penalties, interest, and others 73,945 29,348 86,085 54,845
Utilization of net operating losses (“NOL”) (244,859) (24,138) (300,508)
Changes in valuation allowance 189,518 (52,056) 373,700 36,201
Tax expense per financial statements $ 158,656 $ 99,070 $ 424,722 $ 189,151