Zoho Books Setup for Two Entities

I run two separate businesses—an LLP and a Private Limited company—and I keep everything under a single Zoho Books account. Before transactions start piling up, I want the file set up once, properly, so my full-time certified business accountant can maintain it without surprises later... (Budget: ₹600 - ₹1500 INR, Jobs: Accounting, Bank Reconciliation, Bookkeeping, Financial Consulting, MYOB, Xero)