Turn on the power of the pos machine and enter the operation number and corresponding password. After the input is completed, you will come to the pos card swiping interface. Press "Confirm" and enter "1" to select consumption. After entering the consumption amount, press "Confirm". You will come to the interface of "Please insert card, swipe card or swipe card". Operate the magnetic stripe card first.

Start the POS machine first, and press and hold the Cancel key to start the machine. After successfully booting, press the function key and the words "Consumption, QR code, cancellation, inquiry, etc." will appear. It will appear on the POS screen and select "Consumption". A prompt appears on the POS screen: "Please swipe your card or insert an IC card, or manually enter * *".

After examination and approval by the competent tax authorities, you can purchase tax-controlled cash registers to obtain special invoices for value-added tax.