1st VAT Return Submission - Invalid credentials

Support
1

Where can I find my CREDENTIALS please? What other CREDENTIALS do they want?
Cannot submit my 1st MTD Return because this is what comes back at me.

Vat return submission to HMRC failed.
By Gateway : Authentication Failure. The supplied user credentials failed validation for the requested service.

2

Hi @redadmiral

Are you enrolled on MTD?

3

Thank you. MTD box not ticked. Return now completed, submitted and received by HMRC

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4

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