Hi Rhonda,

I have used three (3) formulas from a 2015 and include a parameter to choose how many items to return.  This came from the 2015 post and it works great.

Create 3 fields:

1. Rank Bottom - Net Pymt:   RANK_UNIQUE(SUM([Net Payment]),'desc')
2. Rank Top - Net Pymt:   RANK_UNIQUE(SUM([Net Payment]),'asc')
3. Rank Filter:    [Rank Top - Net Pymt] <= [Top/bottom N :___]

OR

[Rank Bottom - Net Pymt] <= [Top/bottom N :___]

4. Create a Parameter: (provided image)

Top/bottom N:

Data type: Integer

Current value: 5

Display format: Automatic

Allowable values: ‘All’

Happy Tableau-ing!