If they are charging some absurd (say 20%) interest and you're off by 10k, you might pay them a few hundred in interest if the process is prolonged a month, which is on par with a tax prep service.
If they are charging some absurd (say 20%) interest and you're off by 10k, you might pay them a few hundred in interest if the process is prolonged a month, which is on par with a tax prep service.