Currently, we're unable to change the Profit and Loss (P&L) report from cash method to accrual in the QuickBooks Online (QBO) app. However, we can change your web browser settings. This way, the P&L report in the QuickBooks app will update.
Here's how:
Go to the Gear icon.
Under Your Company, select Account and settings.
Click the Advanced tab.
Select the Accounting edit pencil icon.
Click the Accounting method drop-down arrow, then choose Accrual.