the phrase: 'If you so choose" is used when a person is given an option of choosing between different things.Originally Posted by navi
I have two free concert tickets for tomorrow. We can see the concert at 7 pm and still be home in time to catch mom and dad before they leave. If you are not into it, just let me know and I can still sell the tickets in a split second. We can still watch the concert on TV if you so choose.
Your sentence will actually sound better if you skip so altogether.