I'm new to this app and can't get my text I'm filling in to fit the space. Help
It sounds like the form was poorly designed. You will need to contact the creator of the form to fix it.
Things they can do on their end include:
The only thing you can do is to only write as much text as will fit in the field.
Hope you are doing well. Per the description, I understand that you want to fit a text into a space in a form.
Adding to what @jane-e suggested, you can also reduce the font size of the text you are filling in.
To do so, you must click the small-sized "A" when the hold menu pops up while filling in the form fields.
Adding a screenshot for your reference:
Hope this helps.