After you file

So what would be the point of having the live support? If I'm trying to get help because I'm unsure of how this works (not an accountant) and I express this to the agent, "I feel like this is wrong, and I should be owing taxes?", they look it over, and say everything looks great. And then IRS says, no of course you owe us (about what I'd expected and saved, before I was promised a refund). What was the help I paid for? If the software gets it wrong, and then the live agent gets it wrong, what exactly was I paying for? Also, there's obvsl TurboTax agents here answering, they can surely keep the support open on a throwaway holiday that most people don't even get off.