I mistakenly said that I rented a place in 2024, but I didn't technically pay anything for it. The system won't accept $0.00 for heat. How do I access form 1040-X to fix?

I'm living with my folks and helping with groceries. I believe I've determined that since I cannot access the form that inquired about my rental situation, I need to find form 1040-X. How do I do this?