Input box to select the column impacted by a macro

Hi all,

my current macro is:

Formula:

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I'm looking to set up an input box for me to be able to select the column that has the criteria I'm adding the function to.

The above macro adds a new column to the right of the target column (which holds an SSN that has no dashes), names it, takes cell 2 of that column, writes a formula to add dashes, drags it down to populate the rest of the cells in the range, copies/pastes as values, and then deletes the row it fed from so it becomes the column holding an SSN.

I'm trying to make this a quick access button because this is a function I use extremely often. I'd love to have an input box precede the macro and request which column I'm looking to target (in this case column B).

Any suggestions? I have no concept of how to do this.