# Best Practices ## Recommended setup


Use one data flow per reporting purpose	Rather than pulling every entity into one data flow, create separate flows for AR reporting (Invoices + Customer payments), AP reporting (Bills + Purchase orders), and expense tracking. This makes troubleshooting easier and keeps destinations clean.
Join Invoices with Customer payments	Use the Join transformation to match invoices with their corresponding payments by customer. This gives you a true picture of outstanding balances rather than relying on the balance field alone.
Append data from multiple organizations	If your business runs multiple Zoho Books organizations, create a separate source connection for each and use the Append transformation to consolidate them into a single report.
Send financial summaries to AI destinations	Route Expenses or Invoices data to ChatGPT, Claude, or Gemini to generate plain-language summaries, flag anomalies, or answer ad hoc questions about your financials.

## Data refresh and scheduling


Sync transactional entities daily	Invoices, Bills, Expenses, and Customer payments change frequently. Daily syncs keep your reports accurate for AR/AP tracking and cash flow monitoring.
Sync reference data less often	Entities like Taxes, Items, Organizations, and Users change rarely. A weekly sync — or syncing on-demand when you make changes — is more than enough.
Set a conservative start date on first run	Pulling multiple years of Transactions or Invoices on the first run can be slow and may hit API rate limits. Start with 3–6 months back, confirm the data looks right, then extend the range if needed.

## Common pitfalls {% hint style="danger" %} Don't aggregate invoice or bill totals across currencies without accounting for exchange rates. Zoho Books stores amounts in transaction currency — summing them directly will produce incorrect totals if your organization transacts in multiple currencies. {% endhint %} {% columns %} {% column %} **Do** * Use the `status` field to filter Invoices and Bills (e.g., show only Overdue or Open) * Use a specific Organization ID per connection to avoid mixing data across orgs * Verify your data flow runs successfully before setting a schedule * Pull the Transactions entity when you need a complete ledger view {% endcolumn %} {% column %} **Don't** * Use a low-permission user's API key if you need access to Banking or Journals * Set your start date to the beginning of your account history on the first run — start recent * Combine invoice totals and bill totals in the same column without labeling them — use the Append transformation with a source label * Assume Transactions and Invoices counts will match — they reflect different levels of the ledger {% endcolumn %} {% endcolumns %}