Cancellation of GST no. after 4 months of business

I Take GSt no. at the time of start of my business now after 4 months inwant to cancel my Gst no. in mAy 2024 but I want effective date is to be 31st March and want to Cancke with reason of not covered under threshold limit of 40 lakh
in last 4 month from December 2023 to match 2024 my turnover is 4.5 lakh can I Cancle my Gst no. with effective date of March 2024 in May 2024. Orr any other way there is
please guide
thank u