Transact SQL :: Transform Duplicate Rows From Query Results To One Row

I have three tables, Accounts, AccountCustomer and Customers, and the data-relationshiop between are defined according to the image below:

I created also a query (the sql-query below), displaying the customers for every account that is on the table "Accounts", and I got the results, as we can see in the image below:

SELECT A.AccountID,
c.CustomerNo,
c.Surname,
c.Name,
c.TaxNum
FROM Accounts A
left join AccountCustomer ac on ac.AccountID = A.AccountID
left join Customers c on c.CustomerNo = ac.CustomerNo
order by A.AccountID;

As we understand, an "AccountID" have multiple customers, so I want to transform tha multiple results to one row, grouping by AccountID (one account belongs to one or many Customers), like the image below:

I tried to use row_number()-expression to get this, but I didn't make it. So my question is, how can I alter my sql-query to get the final result like image above?