If the invoice amount is wrong, you can take the following measures:

1. Contact the drawer: First, you can contact the unit or individual who issued the invoice, tell them that the invoice amount is wrong, and ask them to issue a correct invoice again.

2. Submit the correction certificate: If you can't contact the drawer or they refuse to reissue the invoice, you can submit the correction certificate to the tax authorities. The correction certificate shall include detailed reasons for correction, correction amount and relevant certification materials.

3. Correct and reopen: If you deliver the wrong invoice to the customer or use it for other purposes, you need to turn the invoice red and issue the correct invoice again. When issuing invoices, you need to submit relevant certification materials to the tax authorities.

4. Abide by the law: When dealing with the problem of incorrect invoice amount, you need to abide by relevant laws and regulations and the requirements of tax authorities. If it involves false reimbursement and other issues, it may be subject to corresponding legal sanctions.

To sum up, if the invoice amount is wrong, measures should be taken to correct it in time. It is feasible to contact the drawer, submit the correction certificate and re-open it in red ink. At the same time, you need to abide by relevant laws and regulations and the requirements of tax authorities to avoid false reimbursement and other problems.

Legal basis: Article 22 of the Measures for the Administration of Invoices in People's Republic of China (PRC) stipulates: "Invoices shall be issued at one time in accordance with the prescribed time limit, sequence and columns, and stamped with the special invoice seal. No unit or individual may commit the following acts of falsely issuing invoices: (1) Issuing invoices that are inconsistent with the actual business conditions for others and themselves; (two) let others issue invoices for themselves that are inconsistent with the actual business situation; (3) Introducing others to issue invoices that are inconsistent with the actual business situation. " If you commit the above acts, you will be punished by the corresponding laws.