The easiest way is to take the official seal, your ID card and its copy, the original and its copy of the company's tax registration certificate, and the old invoice collection and purchase book, and go to the tax hall. What should you do? Tell the staff of the tax bureau that you should fill in the form, fill in the form, stamp it, bring some blank A4 papers, and write what instructions you need, and stamp it by hand. You can replace the ticket buyer at that time, and you can buy invoices at that time.
If you want to apply for an increase, you can do it at that time.