Follow these online steps to easily connect QuickBooks to your Spend Management Account  

From the Transactions section of Spend Management:

1. Select Accounting settings.
2. Select QuickBooks Online under Software integrations.
3. Enter your QuickBooks Online log in credentials into the Intuit login pop-up window.
4. Select the default for the credit card account, bank account, and expense general ledger account for Spend Management in QuickBooks and select Configure. 
5. Verify the name and uncategorized expense accounts chosen and click Next.
6. Choose to sync all transactions with the option to select settled transactions within a specified date range or not to sync any past transactions and select Continue.
7. Success! A pop-up will confirm that QuickBooks Online is connected, and a green dot will appear next to QuickBooks connected.