This article advises on how to handle rent deposits in Tally.
To begin, first go to Settings > Advanced Settings > Tick Enable Access to Nominal Codes > Click Update. Next, go to Bank > Transaction Types button > Add a new Transaction Type. Name the new type Deposits and set it to Current Asset/Liability or whatever you think appropriate.
You can then record a bank transaction directly against the bank account for the deposit received and select the newly created code in the type field.