"I have invoiced rent for the month of October for a tenant in qb online, then the tenant did not pay for the month of October and leave the premises. He had security deposit from the beginning and I want to offset the security deposit in his rent for October. I have entered debit A/R and credit Rent Income and debit A/R credit Security Deposit upon invoicing of rent and security deposit on October 1. When the tenant paid the security deposit, I entered Cash in bank and credit A/R. When the tenant leave the premises, I entered debit Security Deposit and credit A/R to zero out the Security deposit and A/R. But I am wondering, when I offset the security deposit and A/R, why is it there is still a balance in the A/R account in balance sheet? But in the tenant's ledger there is no more balances. I hope my query be given an answer. Thanks."