How to know amount of cash in my Zerodha account on a particular date

How do I know amount of cash in my Zerodha account on a particular date, March 31, 2020 for example?

The ledger shows the total margin updates including the collateral. I want to know the amount of cash I had in Zerodha account on some previous date.

You can download the ledger report until the specific date, it will show your cash balance, collateral margin isn’t part of the ledger.