Thanks for joining the thread, atki,

Let me provide information about submitting VAT return to HMRC for MTD.

Upon authorizing QuickBooks to interact with HMRC, it takes approximately 72 hours after you have opted in to MTD on HMRC's website. For the meantime, you’ll have to wait for that specific period.

Moreover, in order to submit VAT return to HMRC for MTD, make sure to follow the steps below:

To enable MTD in QuickBooks, here's what you'll need to do:

1. Click Taxes in the left navigation menu.
2. Click on Let's go button at the upper right hand.

Once done, to authorise QuickBooks to interact with HMRC, follow these steps:

1. Click Continue to sign in.
2. Enter your HMRC credentials to sign in.
3. Click on Grant authority to continue.
4. Once the authorisation has been given, you will receive a 'You're connected to HMRC message as below, then click Continue.
5. When the process has been completed, click on Take a look.

That's it! Once you're able to complete this process, you can now submit VAT return for MTD through QuickBooks. 

Note- Please check the date of your VAT period as you can not file before the period ends it will block you from doing that. Also please check  the VAT number is entered correctly in Quickbooks in the VAT  settings and that you have the correct gateway details for the connection. By logging into HMRC gateway with those details.

For more detailed steps, here's a great resource that you can check: Authorise QuickBooks to interact with HMRC - MTD for small businesses.

I'd appreciate if you can update me on how it goes. I'm always here to help. Have a great day!