Joining Tables

Hello, 

I have two tables that I need to join and pull data from. 

Table A holds Projects (Parent), Table B holds Tasks (Child). Table B has a Parent ID column that joins to Table A on the ID column. Here is an example :

I need to identify the corresponding child tasks in Table B for the Projects in Table A.

I've already created a relationship between TableA.ID and TableB.ParentID and tried merging the queries using an inner join, but it did not return any matches (when there are clearly matches there). 

Any suggestions? Thanks in advance!