You don't need any information to report a company's tax evasion. You can report it directly to the tax bureau. Law of the People's Republic of China on the Administration of Tax Collection Article 62 If a taxpayer fails to file a tax return and submit tax information within the prescribed time limit, or a withholding agent fails to submit a tax withholding report and relevant information to the tax authorities within the prescribed time limit, the tax authorities shall order it to make corrections within a prescribed time limit and may impose a fine of less than 2,000 yuan; If the circumstances are serious, a fine of not less than two thousand yuan but not more than ten thousand yuan may be imposed. Article 63 A taxpayer who forges, alters, conceals or destroys account books and vouchers without authorization, or overstretches expenditures or omits or understates income in account books, or refuses to declare or makes false tax returns after being notified by the tax authorities, and fails to pay or underpays the tax payable, is guilty of tax evasion. If a taxpayer evades taxes, the tax authorities shall recover the taxes and late fees that he fails to pay or underpays, and impose a fine of not less than 50% but not more than five times the taxes that he fails to pay or underpays; If a crime is constituted, criminal responsibility shall be investigated according to law. If the withholding agent fails to pay or underpays the tax withheld or collected by the means listed in the preceding paragraph, the tax authorities shall recover the tax withheld or underpaid and the overdue fine, and impose a fine of not less than 50% but not more than five times the tax unpaid or underpaid; If a crime is constituted, criminal responsibility shall be investigated according to law.

Legal objectivity:

Article 13 of the Law of the People's Republic of China on Tax Collection and Administration, any unit or individual has the right to report any violation of tax laws and administrative regulations. The organ that receives the report and the organ that is responsible for investigating and handling it shall keep confidential the informant. The tax authorities shall, in accordance with the provisions, reward the informants. Law of the People's Republic of China on the Administration of Tax Collection Article 14 The tax authorities mentioned in this Law refer to tax bureaus at all levels, tax sub-bureaus, tax offices and tax agencies established in accordance with the regulations of the State Council and announced to the public. Law of the People's Republic of China on the Administration of Tax Collection Article 68 If a taxpayer or withholding agent fails to pay or underpays the tax payable or payable within the prescribed time limit and is ordered by the tax authorities to pay within the prescribed time limit, the tax authorities shall, in addition to taking enforcement measures to recover the tax unpaid or underpaid, impose a fine of not less than 50% but not more than five times the tax unpaid or underpaid.