We keep losing connection to our Agent Services Account and are having to reconnect it every week or so. We are not aware that we are doing anything different. Any ideas?

I appreciate you contacting us regarding your Agent Services Account connection with QuickBooks, @agsmith1610. Allow me to share some insights about it and get you going.

Submitting a VAT return is on a quarterly basis, but it can vary depending on your specific VAT reporting schedule. If you're on a quarterly schedule, you won't be able to submit your return until the month period ends. Otherwise, there will be connection issues, which you're currently experiencing.
 

For more information about the process, check out this link: Submit a VAT return to HMRC using MTD in QuickBooks Online.

Moreover, I'm adding this resource for future reference that explains what you should do if you receive errors connecting to Making Tax Digital: Fix MTD issues and errors in QuickBooks Online.

Keep us in the loop if you have additional questions about submitting a VAT return. The Community team is always available to answer them for you. 

Thank you for your response. We are a firm of accounts and have been using QBs to file VAT returns for 5 years. We currently have over 50 clients we submit vat returns for via our ASA.

The issue is that we keep losing connection with HMRC. It first happened in October and then again on Monday and yesterday. After reconnecting the ASA it does allow us to submit the VAT returns but we cannot understand why it keeps disconnecting our account. I'm posting here incase it is happening to anyone else.

Hello Agsmith1610, thanks for posting on this thread, so it should not keep disconnecting for you, can you ring the supportline on 0808 234 5337 so this can be looked into more for you, the line is open mon to fri 8am to 7pm and is free from any UK landline or mobile.