Hello, you mentioned two kinds of invoices. One is the output invoice representing your sales income. You don't need to go to the tax authorities specially. You just need to complete online declaration and online invoicing every month, and then check the old ones and buy new ones when F tickets are used up.

Another kind of ticket you receive is the so-called input F ticket, depending on the actual situation of your company, because there is online remote authentication now. If you don't handle it, you will go to the tax authorities for door-to-door certification and deduction after the 25th of each month.

I hope it helps you.