Ben Miller has already answered with some ways you might be able to bring your adjusted gross income below the cutoff.
If you are unable or unwilling to do so, then your options are more limited:
- Pay the $30 (which is actually a pretty good deal for tax prep software - I paid nearly $70 for mine this year)
- Go elsewhere (several of the other answers proposed various possibilities)
Fundamentally, a limit like this must be a hard limit, or else it is meaningless. If they move it for you, then they need to move it for everyone else who's in a similar situation. So let's say that your income was $66,249 so you're over the limit of $66,000, but would be under at $66,250. So they make $66,250 the new limit. But then someone at $66,499 would have a reasonable argument that the limit really ought to be $66,500. And so on.
Let's reverse the situation, to make it more plain: Let's say that you have contracted with a company at a rate of $100 per hour. At your first pay cycle, you discover that they have only paid you $99 per hour. But their reasoning is, "$99 is staggeringly close to $100, so you really should just accept that." Following pay cycle, they pay $98/hour, for the same reason. Etc. No! No sane person would accept that. If they're not paying you $100, they're breaching the contract.
There are dozens of tax preparation companies and software packages. None of these are official IRS representatives. Their rules and regulations are contractual - what you must fulfill in order to use their service - not legal. Nor is there any requirement that you must use any such service in order to complete your taxes. By using their software to submit your taxes, you agree to abide by the contract as stated - which includes any income limits. If you don't like the limit, or any other clause of the contract, you walk away.
You also need to consider that this $30 is in lieu of sitting down face-to-face with a tax prep specialist, who will charge much more than $30 for their time.