帮忙翻译英语，非常感谢~~~

We found a serious problem. The goods we are going to receive is different from the invoice.
We are receing 12 pieces, but on the invoice it is 11 pieces.
Please modify the invoice and the packing list, because we need them for customs clearance.

“ We've found a serious problem that there is a difference between the products that we're going to receive and that in your invoice. The number of products that we're going to receive is twelve, however, that in your invoice is eleven. Please amend your invoice for the reason that we'll use it to do the customs clearance."

【公益慈善翻译团】真诚为你解答！

Please be aware of a serious problem that the goods to be received are different from what is written in your invoice. That is, we have received 12 pieces of goods, but the invoice says 11 pieces. Therefore, please modify the invoice as well as the packing list to facilitate the cleanrance.
仅供参考，望能帮助到你，呵呵！

we have found a serious problem that what we received was different from your receipt.
the cargo which we recieved is 12,however, the number showed in your receipt is 11.so please revise the receipt and the packing list for the reason that we must use it clear the goods for export

We found a serious problem, the goods under customs clearance are 12 pieces,but the number in your invoice are 11 pieces, its different. Please amend your invoice and packing list, because we'll use it for customs clearance.