Do you use a comma when starting a sentence with so?

When you guys start a sentence with "so," do you put a comma after the "so?"  Or do you try to just not start sentences with "so" altogether?

This might seem like a stupid question, but things like "so" really matter in court reporting.

Another Reporter posted this information earlier. 

Do not insert a comma after Hence, Thus, So or Yet.

Oh, my gosh!  I got on here to ask the same exact question.  I never put a comma before so, unless it's "So, you know," or something like that.  I just did some freelance work for a firm I'd never worked for, so they had to proof my job, and that was the correction I got back.   I'm looking for something official to rebut with. 

Hello.

You have been rightly counseled not to use a comma after "so" at the beginning of a sentence.

Thought I'd take a moment, though, to point this out:

You wrote: When you guys start a sentence with "so," do you put a comma after the "so?"

The question mark above goes after, not before, the close quote.

Hello, AmandaCat.

In American English, all sentence-ending punctuation goes inside of the close quote, not outside. (Note that a semicolon is not a sentence-ending mark of punctuation, which is to say that semicolons are not terminal punctuation marks.)

Commas and periods inside; semicolons outside.