First Fba ShipmentFrom Turkey To Fba Germany

Hello
I will send the first shipment to Amazon FBA Germany from Turkey and I have some questions
I have a VATnumber registered in Germany, but I want to send the goods with a transport company that will ship in addition to customs clearance using their tax number as a importer in Germany, then they will deliver the goods to the Amazon center.

Is there a problem in Amazon if the customs clearance process is completed and customs tax is paid through a third party?
Will any documents related to customs clearance be required from me upon arrival of the goods?
Do I have to submit invoices for purchasing goods on Amazon from the supplier?

Thank You