Can anyone help...my mtd will not allow me to submit my vat return as it states it cannot connect with hmrc and to leave it 72 hours,.ive done this but no success ????

Sometimes you'll experience issues when submitting to HMRC. I'll guide you on how to fix this, Richard.

When connecting with Making Tax Digital (MTD) to submit a return, ensure to check the email confirmation from HRMC. This will confirm if your connection is successful and usually this takes up to 72 hours.

Once done, the email will now have your new MTD credentials which can be used to set up the MTD feature in QuickBooks. However, if you're still getting the same, check your VAT registration number. It should match the one you use in QuickBooks. Usually, when you're using a different VAT registration number, you may experience issues when submitting your return. Make sure to check your VAT settings.

If the issue persists, you can continue with solution 3 in this article. Please check this out for your reference: Fix MTD Issues And Errors In QuickBooks Online.

Moreover, you may have missed some of the information and wants to make changes and exceptions, Read this article so you'll know what to do next: VAT Exceptions And Reports In QuickBooks Online.

Please let me know by posting your comment below if you have any other questions when submitting the return. I'm always available anytime if you need further assistance. Have a great day ahead!