Generally, a guilty plea waives most trial-related issues, but not all. You can challenge the plea’s legality (e.g., whether it was knowing and voluntary), jurisdictional defects, certain sentencing errors, and sometimes the constitutionality of statutes or conditions imposed. While written plea agreements may include appeal waivers, some claims can still be raised on direct appeal. If your plea was misunderstood, coerced, or based on ineffective assistance of counsel, these claims typically require post-conviction proceedings rather than a direct appeal because the necessary facts are not part of the official record. It is crucial to promptly review the plea transcript, judgment, and agreement with an appellate lawyer to identify any appealable issues and meet strict deadlines.