IT trading company seeks customs software (export)

We are an IT trading company based in northern Germany and are looking for customs software (export).

The solution should meet the following requirements:

• Easy customs registration for exports from the EU – similar to what UPS offers its customers
• Compatible with all carriers, even if we do not have a contract with them. In the latter case, our customer commissions the transport and we have to complete the customs declaration. And we have to do this without having any internal knowledge of the carrier, e.g., which customs offices it works with.
• It must be possible to use the software without the ELSTER certificate for the respective processes, only for the one-time setup, in which case it would be OK.
• Windows or Linux compatible.

This is for one software workstation.