German Tax - Zusammenfassende Meldung (ZM)

We received a letter from German tax office regarding Zusammenfassende Meldung (ZM) which they say needs submitting for Q1. All our German sales are declared and filed through the Amazon service, and I’m not sure what this notice means, what we need to do or if it’s a mistake, so I asked our Amazon tax agent and received this response;

"Dear Seller

Amazon VAT services include the submissions of EC sales list sending alongside with VAT returns on each month in the German. This letter is just a reminder from the DE tax office that EC sales list need to be submitted.

Bear in mind it is a seller’s responsibility to inform Amazon VAT Services when the threshold for the Intrastat has been reached.

If you need assistance to file Intrastat returns, please contact VAT service on Amazon via Seller Central Contact us -> VAT and Tax->Get help on VAT registration and VAT filing via Amazon

Best Regards"

Ok so I send the same question for VAT filing via Amazon and get this response;

"Hello from Amazon Selling Partner Support,

I understand that you received letter from German Tax Office.

For any Tax authorities related communication, please reach out to Tax Agent Partner by Seller Central > Reports > Manage your VAT > FAQ > I have a question related to Tax office notices. How can I get support? > Message Tax Agent"

I’d originally asked the Tax agent and they sent me to Amazon filings, who sent me back to the Tax agent.

I’m obviously concerned as I’ve received an official looking letter with the threat of fines and no answer as to what I need to do!