We have migrated from accounting software, spreadsheets, paper records and combinations of all three. The source does not matter — the output always balances.
Most migrations take the closing trial balance and paste it as a single opening journal entry. That gives you a balance sheet that matches — but no history, no AR detail, no AP detail, and no way to reconcile anything. We do not do that.
When your bank account reconciles in Zoho Books and your AR and AP match the old system, your GST returns for the transition period are clean. You are not correcting the previous system's errors in the new one. GSTR-2B reconciliation works from day one.
Each data type goes into the correct module in Zoho Books — not collapsed into a journal entry that cannot be used for anything.
One conversation is usually enough to understand your setup and tell you honestly what we can fix, how long it takes, and what it costs. No obligation.