1. Check the tax rate on the invoice: the tax rate will be displayed on the invoice. If the tax rate is too high, the tax amount may exceed the actual tax amount payable.
2. Contact the tax bureau: If you think that the tax amount on the invoice is wrong, you can contact the tax bureau for verification.
3. Check the pre-tax amount: the pre-tax amount refers to the amount before calculating the tax amount. If the pre-tax amount is too high, the tax amount may exceed the actual tax payable.