"I would like to include this in August's invoice, could you please do that for me?"
- "I would like to include this in August's invoice, could you please do that for me?"
"I would like to include ~" 「〜を計上したい」
"in August's invoice" 「8月分の請求書に」"in the invoice for August" も使えます。
"invoice" 「請求書」"bill" も言えます。
"could you please do that for me?" 「処理お願いします」
Please process this so it can be included in the August invoice.
『8月分の請求書に計上したいから処理お願いします』を英語で表現する場合、Please process this so it can be included in the August invoice. が適しています。
また、以下のように表現することもできます：
Could you make sure this is included in the August invoice?
I need this processed for the August billing.
オーストラリア 
アメリカ合衆国 
