Dynamic Range for List

I am looking to build a dynamic range(I think I need this). Under the assumptions tab, I have the loan listed in Column A and Months remaining in column B. As you can see I built a list for each loan(58 total). The issue now is that, I plan on having many more loans and I figured it would be smart to learn dynamic range. I have looked at it online, but I am unsure as to how I should implement it. The sheet, default database calculates the maximum number of months remaining. For example, Loan 1 only goes to 56, so cell B3 of Assumptions has the range go up to 56. I want this similar logic to apply to all the loans below. I have only done to loan 58, but would prefer to use dynamic range. Thanks for the help. If any questions, feel free to ask. Thanks again

Originally Posted by darkyam

I don't really understand how you would intend to use the dynamic range. Where would it go and to what end? The table you have on the second tab seems to work (though I don't know its function). Could you walk us through an example of how you would use this information and a dynamic range?

Essentially I went to Cell B3 through B59 (sheet Assumptions) and individual did a Data validation and created a list using the sheet Default Database corresponding row.
Example: I went to B3(assumptions tab), did data validation and created list using default database row 2 between column E to FK.

I now realize I have to do this approximately 650 more times and was hoping for a quicker method. Let me know if that helps. I think using a dynamic range I could automate this process, but I am not sure.