Hi Linda,
Before you are able to submit your first return you have to make sure that all of your settings are correct. You may find this guide useful.
HMRC Tax Accounts - MTD Returns
Once all your settings are correct and you have submitted your return it will show as Submitted on the main page and you will also have a reference from HMRC. If you are seeing the word Saved then this means it has not been submitted. You will need to roll back the return and try the process again from Reports > HMRC
Hope this helps