Your invoice says ₹50,000. Your general ledger shows ₹49,998. The difference vanishes between two spreadsheets, and your finance team spends Wednesday digging through line items instead of closing the month. This is not a rounding error—it's a sync break, and there are nine of them hiding in your invoicing-to-GL pipeline. Most businesses discover these breaks too late: during audit, during month-end close, or when a tax authority questions why your invoice total and GL entry diverge. The fix is not better copy-paste discipline. It's knowing exactly where invoices and GL accounts split, how to spot each break in 10 minutes, and which platforms prevent them with real-time sync. Break 1: Tax code mismatch between invoice and GL posting You issue an invoice with GST at 6%. Your invoicing tool calculates ₹3,000 in tax and posts it to GL account 2110 (GST Payable). Somewhere in the GL, that same invoice also touches account 4200 (Sales Revenue), but the tax code attached to that line is SST, not GST. Or worse: no tax code at all. This happens because invoicing and accounting systems store tax metadata separately. Your invoice knows it's GST; your GL posting doesn't. When you reconcile, the GL shows two tax lines where the invoice shows one. How to audit it: Export your invoices and your GL for the same period. Filter both for a single invoice. Count the GL lines. If you see more lines in GL than items on the invoice, tax code splits are happening. Check whether each GL line's tax code matches the invoice's tax code field. Why it matters: Tax audits start here. If your invoice claims GST but your GL shows SST, you've created a liability mismatch that snowballs into reclassifications and penalties. Break 2: Multi-currency rounding splits the penny You invoice a client in USD at 1.32 MYR per USD. The invoice total is USD 1,500, which equals MYR 1,980.00 exactly. But your GL posting rounds at a different point. The system converts each line item separately, then sums them. Line 1: USD 1,000 = MYR 1,320.00. Line 2: USD 500 = MYR 660.01. Total in GL: MYR 1,980.01. One cent. Multiply across 50 invoices a month, and you're reconciling ₹50 in phantom discrepancies. How to audit it: Pull all multi-currency invoices for the period. For each one, manually convert the total at the invoice's FX rate, then sum the GL line amounts. If they differ by more than ±0.01 in your base currency, a rounding split occurred. Document the threshold your accounting software uses: some round at invoice total, others at line level. Prevention: Platforms with real-time GL sync (like Orin's invoicing with integrated accounting ) post the invoice total first, then calculate GL lines to match it, eliminating rounding splits. Break 3: Invoice date vs. GL posting date mismatch You issue an invoice on March 28. Your invoicing system stamps it March 28. But your GL posting date defaults to the last day of the month (March 31), because your accounting team runs a batch close. The invoice sits in your invoicing tool dated March 28; the GL entry is dated March 31. When you reconcile by date, they don't match. This cascades: your AR aging report says the invoice is 35 days old; your GL says 32 days. Month-end reconciliation breaks because transactions are in different periods. How to audit it: Pull a report of invoices by invoice date and GL entries by posting date for the same period. Count invoices in each date bucket. If invoice counts don't match GL counts by date, date-shift splits are occurring. A 3-day lag is common; anything larger signals a batch delay. Break 4: GL account reassignment after invoice posting You post an invoice to GL account 4100 (Service Revenue). Three weeks later, your finance manager reclassifies that account as 4150 (Consulting Revenue) to match the audit chart of accounts. The invoice is still tied to 4100 in your invoicing system. Your GL now shows 4150. They're the same economic transaction but different GL accounts. When you reconcile by GL account, the invoice and the posting diverge. How to audit it: Export your Chart of Accounts with effective dates. Cross-reference each invoice's GL account against the COA on the invoice date. If the GL account was retired, merged, or renamed after the invoice was posted, flag it. This break requires manual investigation—there's no automated detection. Break 5: Line-item splitting when one invoice becomes multiple GL entries A single invoice has three line items: service A (₹20,000), service B (₹15,000), expense reimbursement (₹5,000). In your invoicing tool, it's one record. In your GL, it becomes three separate line entries, each posting to a different account (4100, 4200, 5000). When you reconcile line by line, they don't match. You expected three invoice lines; you're seeing nine GL lines (three for the invoice, three for tax, three for other adjustments). How to audit it: For invoices with multiple line items, trace each item to its GL posting. If one invoice line maps to multipl