FI Balance migration activity

Dear All,

We have implemented S4 HANA 1709 and go live on Nov 2018.at the go live time SAP partner not uploaded proper Balance of Asset,GL,Vendor And Customer data in system and started PRD server for daily operation activity. Nowdays, we cant run the balance sheet from SAP.

now, i have crossed check the SAP GL with Tally and matching the SAP balance as per tally balance.(Tally balance is correct our base is tally)

Due to poor implementation of balance activity there is some balance in legacy GL.

Can we match balances of GL and pass the JV and can we adjust legacy balance with stock.

Please help me how to make "0" balance in SAP.