Assign forms to clients

From your 'My Hub' page (please see below)

On the left hand side of your account, you will see the side menu where you can select 'Forms'.

You will see a list of all forms you have created 

If you click the 3 horizontal grey dots next to a form and select 'Assign To Client'...

You can then choose from your client list who you would like to assign it to.