SAP B1 MTD Connection Fix

My SAP Business One system stopped sending VAT returns to HMRC right after the last update. Each attempt ends with the MTD add-on throwing a “temporary error” during submission, so nothing reaches the HMRC gateway.

I need someone who knows the SAP B1 Making Tax Digital add-on inside out to:

• Pinpoint why the connector now fails and clear the “temporary error” message.
• Re-establish a clean, authenticated connection so the return goes straight through to HMRC without manual work-arounds.
• Prove the fix by running a test submission (or simulation) and showing the accepted response reference.
• Leave me with brief notes explaining what was changed so I can avoid the same issue at the next update.

You’ll have remote access to the SAP B1 environment; all licensing and HMRC credentials are ready. Once I see a successful submission and have your short hand-over notes, the job is complete.