Intercompany invoice between two entities in same ledger

Summary:

We've a specific scenario related to India GST.

1. Two entities - 323 /801 falls under same India Ledger.
2. Supplier Invoice created with 323 with GST calculation.
3. Tax calculated in above step(2) has to be divided between 323 (50%) & 801 (50%)

Note : We've not enabled India localization /AR. Any guidance to achieve this requirement would be helpful.

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