DAX Beginner - Need help with displaying/replacing items depending on the quarter selected.

The end goal of this DAX:

• Replace “FALSE” with “TBD” for teams with no existing goals (when current or future quarter is selected from slicer).
• Display TRUE for teams that have existing goals—regardless of the quarter selected (already working).
• Display FALSE for teams with no existing goals past quarters and do not = current quarter (this is where I am getting stuck ☹)

Here’s what I have currently--no trouble with replacing "False" fields (which are currently formatted as text) with "TBD." 

goalExists =

IF([teams_with_goal]=0, "TBD", TRUE())

After this, it's clear that all my False values are replaced with TBD.

For reference, this is the teams_with_goal measure:

teams_with_goal =

CALCULATE(

    DISTINCTCOUNT(SquadTeams[Id]) +0,

    ALLNOBLANKROW('SquadHealthCheckGoal'[ID])

)

After creating the above measure, I was able to duplicate/change the column type to text and replaced with True/False. That being said, I can't seem to wrap my head around only replacing the "False" values for current or future months

Any insight is greatly appreciated 🙂