Would my marks get deducted for changing my answer halfway through the speech in the TOEFL?

I achieved a perfect score of 30/30 without studying, despite English being my third language. Having lived in London for a year, my English proficiency is quite strong, which gave me confidence going into the exam. As a result, I scored 118/120. Reflecting on what contributed to a high score in writing, here are some key tips:

1. Varied Vocabulary: Using a diverse range of vocabulary and sentence starters can significantly enhance your writing.
2. Effective Structure: A clear structure is crucial. For TOEFL writing, a five-paragraph format works well: IntroductionFirst ArgumentSecond ArgumentThird ArgumentConclusion While not mandatory to have exactly five paragraphs, this structure helps organize your thoughts and arguments effectively.
3. Sentence Variety: Mix short, impactful sentences with longer, more complex ones. This combination makes your text more engaging and demonstrates your language skills.
4. Use of Adverbs: Incorporating adverbs can improve the readability of your text and make it more engaging.
5. Planning: Spend about five minutes planning your essay. Outline what each paragraph will cover to ensure a coherent and well-organized response.
6. Confidence: Approach the test as if you are a British academic with perfect language skills. This mindset can boost your confidence and improve the quality of your writing.
7. Focus on Language Skills: The content of your opinion is less important than showcasing your language proficiency. Choose an opinion that allows you to demonstrate your language skills effectively without overthinking the topic.