• Basic forms
• 辞める — to quit; resign; give up / base form
• 辞めます — quit; resign / masu form
• 辞めた — quit; resigned / ta form
• 辞めて — quit and … / te-form
• 辞めない — do not quit / negative
• 辞めれば — if (someone) quits / conditional
• 辞めろ・辞めなさい — quit! / imperative
• Other common forms
• 仕事を辞める — quit a job
• 会社を辞めた — left the company
• More
• 辞めよう — let’s quit / 〜よう form
• 辞めなかった — didn’t quit
• 辞めている — has quit; is no longer doing / resultative

辞める（やめる） is an ichidan verb. Drop る to form endings such as ます, た, て, and ない. Commonly used for quitting jobs, stopping activities, or resigning from positions.