Yes, you can amend shipping documents.
1. As for your question that why Thai Customs can accept zero value item ?
Ans Thai Customs no need zero value and value is needed on the shipping
documents. But invoice need to show “Value for the Customs Purpose only”
So I think it will be better if you separate Testing Fan to another invoice and declare “Value for the Customs purpose only”
2. For your invoice, could you please kindly revise company address as below ; Because our accounting dept. requested to revise the company address as same as
30/105 MOO 1, CHETSADAWITHI ROAD,
KHOK KHAM, MUENG SAMUTSAKORN,
SAMUTSAKORN 74000, THAILAND
3. For next shipment, please kindly issue Form D to us for submitting this documents to The Thai Customs Department.
Thank you very much for your kind cooperation.