Sync from LedgrOS

LedgrOS is the ORIS bookkeeping product. The data contract between LedgrOS and ThynkTax is direct - no API keys, no configuration. Books written in LedgrOS appear in ThynkTax within 30 seconds.

Prerequisites

• The client uses LedgrOS as their bookkeeping platform
• The client's LedgrOS tenant is on the same ORIS umbrella as your ThynkTax tenant (verified via the ORIS Identity ID)

Enable the sync

1. Settings → Integrations → LedgrOS
2. Click Connect
3. The ORIS Identity flow opens - confirm permission to read the LedgrOS tenant
4. Pick which client GSTINs to sync (defaults: all)
5. Pick the sync direction: LedgrOS → ThynkTax (default; read-only from LedgrOS)

What syncs

• Chart of accounts
• All voucher types (sales, purchase, journal, receipt, payment, contra)
• Customer & supplier masters
• Bank book and reconciliation
• TDS deduction entries
• Asset register
• Inventory (if used)

What doesn't sync

• Custom fields configured in LedgrOS that don't have a ThynkTax counterpart - these are accessible via API but not surfaced in the UI.
• Notes / comments - stay in LedgrOS.
• File attachments - stay in LedgrOS; ThynkTax shows a "view in LedgrOS" link.

Bi-directional?

By default, no - ThynkTax is read-only against LedgrOS books. You can opt into bi-directional sync from Settings → Integrations → LedgrOS → Advanced. When enabled, any ThynkTax-side correction (e.g. reclassifying a journal entry during ITR prep) writes back to LedgrOS.

We recommend keeping it one-way unless you have a specific reason - it keeps the audit trail simpler.