How do I create a formula that references a specific tab in Excel?

[fberg]

How do I create a formula that references a worksheet tab without using the
tab's name? I'm using the formula in a different file from the source data
I'm referencing. This source file will be written over constantly with a new
source file. The file name and path will always remain the same, and I
always want to reference the same worksheet tab and cell, but the worksheet
tab's name will change. In other words, I always want my file to reference
cell A2 in the 2nd tab from the left from the source file.

 

[Test]

Worksheets can be referred to either by name or index number. Use the index
number to solve your problem.