Sales Goals Tables

I am trying to track future sales revenue forecasting for reporting and planning purposes. 

I have a table for Team Members (basically an Employees table)
I have a table for Teams (Employees are associated with a team and generate revenue as a team)
I have a table for Quarterly Sales Goals

One team has many team members
One team has many quarterly sales goals

On the quarterly sales goals I have two fields, Date and currency.  The currency is of course the revenue.  I want the date to correspond with a quarter/year not a specific date.  How do i do that?  I can foresee users entering data inadvertently in the same quarter if they can pick any date.  

For example I want to be able to see the following for next year:

Team Name       Date                      Revenue
Team A              Quarter 1 2020    3 Million
Team A              Quarter 2 2020    2 Million
Team A              Quarter 3 2020     4 Million
Team A              Quarter 4 2020     3 Million
Team B              Quarter 1 2020      6 Million
Team B               Quarter 2 2020     3 Million
etc.....

I do not want the various teams to see each others goals but I want to be able to see them roll up together in a year.

Separately we have an Invocies table and ultimately I will pull reporting comparing the amount invoiced against the goals etc.

------------------------------
Ivan Weiss
------------------------------