1. Check the file. Such as: tax inspection notice, account book inspection notice, administrative law enforcement approval form, inquiry notice, etc.

2. Basic information of the enterprise. Enterprise registration, tax declaration, tax rate, competent tax authorities, etc.

3. Production and operation of the enterprise. Can be obtained through the network, tax collection and management system and other channels.

Two. Information to be prepared by taxpayers

1. Accounting books, accounting vouchers and other financial information

2 tax returns, audit reports and other information; 3. Purchase and sale contract; 4. Invoice receiving and purchasing book, invoice stub, deduction coupon, etc. ;

5. Tax registration and business registration materials;

6. Other materials required by the tax authorities.