Issue with adding vertical line to stacked column

I've attached the file. My goal was to add a vertical line (retirement year) to the stacked columns to provide a visual aid to better distinguish working years from retirement years. I was successful at adding the vertical line. BUT...for some reason it stays at the first year and will not move to the right.

I added a line graph on the seconday axis with (X,Y) values of (2044,0) and (2044,1). It even shows that when I hover over the points on the chart. However, the line is angles instead of straight and it is not centered on 2044 - it's center on 2014.

Help please!!

Thanks,
Brian

Thanks Andy, makes sense. I got the line to work, the only problem for me now is even though I am telling the height of the line to be (in this case) $35,000 it is stopping at $30,000. I want the line to go all the way up to the highest Y value, which it looks like I'm telling it to do. I'm telling it to use points(31,$0) and (31,$35,000).

Any thoughts on this? See attached. Thanks again!

I am not a expert, but wanted to give another suggestion...
Andy's way is the #1 way to do this, for sure!

But, if you are just going to keep a vertical line on the chart that goes from the top of the plot area to the bottom of the plot area, you can add a shape line to the graph. I do this on many graphs instead of having to change the data to fit within the plot each time. Then the line can just be dragged to the location you want it in each time you update the graph.