What if users can't invoice online? In this case, users can try to issue invoices by SMS. There are no operating instructions and I don't know how to quote them.

There are instructions in the user manual of Tianyi Tax Link: When cable, wifi, 1X and 3G channels are unavailable, click on the SMS connection, and then click on the online invoice. Tianyi tax bill will automatically open the SMS billing interface window, and the user will log in to the system for billing operation. You can call 10000+9+6 for expert consultation. Thank you for your interest in telecom products. I wish you a happy life. If the above information can't solve your problem, you can also log in to Guangdong Telecom Mobile Mall () to seek help from online customer service, which is available 7X24 hours a day!