Business Meal and Entertainment Deduction Rules

I have business meal and entertainment expenses and need to understand what's deductible.

My expenses:
- Client meals: [Amount]
- Team/employee meals: [Amount]
- Business travel meals: [Amount]
- Entertainment events: [Amount]
- Office snacks and meals: [Amount]
- Holiday parties: [Amount]
- Golf outings with clients: [Amount]
- Sporting event tickets: [Amount]

Business context:
- Business type: [Type]
- Number of employees: [Number]
- Client-facing business: [Yes/No]
- Frequent business travel: [Yes/No]

Please explain:
1. Current meal deduction rules (50% vs. 100%)
2. Entertainment deduction rules (generally not deductible)
3. What qualifies as a business meal
4. Documentation requirements (who, what, when, where, why)
5. De minimis fringe benefit rules
6. Employee meal exceptions
7. Travel meal rules
8. Home office meal deductions
9. Best practices for tracking and categorizing