Write a year-end tax planning checklist in a {{tone}} tone for {{target_audience}} in the {{industry}} industry. The checklist must be actionable with checkboxes and brief explanations. Group items under sections: October, November, December actions, industry-specific strategies, investment portfolio review, documentation checklist, and post year-end. Maximum 1800 words. Every recommendation must be specific to {{industry}} professionals. Paste any relevant background information after these instructions before running.