Event and Travel Planner- Vehicle Mileage and Rental Vehicle

I started an event and travel business in 2024.  I own a car and use it 60% of the time for business related consultations, meetings, travel, etc.  I rent a van for the actual events. 

If I use standard mileage this year and decide next year to do actual expenses for the car, can I switch back and forth? 

 

The rental van I just deduct the rental expenses.

 

Thanks,