Dear, 1. First check whether the network connection and configuration are normal; 2. If it is normal, check whether the offline amount and offline time in the state of tax control equipment are normal. The offline amount cannot be lower than the billing limit. If it is lower than the billing limit and the billing amount exceeds the offline amount, it will definitely prompt this information. It is suggested that the customer bring the tax control panel to the tax bureau to modify the offline time or offline amount.