First, double check that your answer is within the character count (including spaces) by copying it to a text document and using the ‘word count’ option. Also look at how much vertical space your answer takes up. Even though it’s under the character limit it may be physically too long. If you find you have to scroll a long way to read the answer, try joining paragraphs together and deleting spaces between headings. If you have bullet-pointed ‘lists’, separate the points by semi-colons so they read across the page, rather than down. For example: ‘Point A; point B; point C etc’.
Long lists of items that descend down the field may be something to watch for in the ‘budget’ section in particular. When filling in your budget, avoid copying directly from an Excel document as this may add extra invisible spaces.