Immigration is one of the most consequential and least forgiving areas of law. A single mistake on a Form I-130, a missed biometrics appointment, a wrong answer at a USCIS interview, or a state criminal plea that triggers deportation under the categorical approach can undo years of work and separate families permanently. The system has hundreds of forms, dozens of visa categories, and policies that change with each administration. Pro-se applicants face higher denial rates and higher rates of being placed in removal proceedings — sometimes because of the application itself. An immigration attorney knows the forms, the case law, the procedural traps (the one-year asylum bar, the unlawful-presence triggers, the inadmissibility grounds), and how to evaluate criminal records for immigration consequences before any plea is entered.