I have a dataset with effective dates that are monthly.
Tableau seems to be great about picking up the Year, Quarter, & Month, of that effective date, but when I put the summarized data on a line chart, there are breaks in the lines when they cross the quarterly marks on the horizontal axis.
Is there a setting to make this a continuous line instead of breaks at each quarter?
It sounds like you're using discrete dates (blue pill).
Try changing to continuous (green pills).
Depending on the exact look you're going for, you can either flip from discrete to continuous in the menu below, or select one of the options begining in the second block of date values (where my cursor has highlighted month)