Why can't I file my clients VAT Return, my client is enabled for MTD and I have an ASA and my client has authorised me, but still I can't file the Return which is late.

What exactly happens when you try to file your VAT return? Do you see a specific error code, or is the submit button grayed out?

Filing issues usually happen when your 18-month HMRC authorisation period expires, which disconnects your account from QuickBooks.

To re-authorise this within QuickBooks, please follow the steps below:

1. Go to All Apps, then select Overview under the VAT section.
2. Select Edit VAT/ITSA Settings.
3. Turn off MTD.
4. Reconnect QuickBooks to HMRC using the current MTD credentials.

If you still cannot connect, try logging in using a private/incognito window or switch to another browser to quickly rule out any local cache issues.

I'll be here in the Community space if you require further assistance in completing your VAT return.