It won't. Businesses are free to arbitrarily choose who they do business with, so long as it doesn't discriminate against protected classes of people. But that coin has two sides. We can discriminate against Intuit. Spread this link around.
So could Intuit decide to discriminate against a company because of religouis reasons, or would that be illegal? Because religion and firearms have the same constitutionally protected status? Any business that can't use religion as an excuse to discriminate can't use firearms as a reason.