I want to make sure we're on the same page when it comes to posting an entry in QuickBooks Online - India.
We recently extended your access to QBO India until April 30, 2023. Therefore, you can still create a transaction with a date of March 31, 2023, until April 30, 2023. Read this article for more details: Discontinuation of QuickBooks in India.
If you mean a different thing, kindly provide more information so we can look into it and help you further.