Can you walk me through how to file my annual income tax return in the Netherlands step by step?

I need to file my annual income tax return in the Netherlands (aangifte inkomstenbelasting) and I am not sure where to start. Can you walk me through the entire process from beginning to end? What do I need to prepare before I start, what do I need to log in, how do I navigate the Belastingdienst online portal, what sections do I need to fill in, and what happens after I submit? I would also like to know what to do if I make a mistake after submitting, whether I can request more time if I need it, and what the consequences are if I miss the deadline. I am looking for a clear practical guide I can follow from start to finish.