Are you always suppressing the text field or only sometimes? If always, then just take it off of the report.
Are all of the text fields in their own section? If there are no labels, turn on "Suppress blank section" in the section expert.
Is this a long text field (i.e., a memo field) or a short one? How tall is it in the section? If it's tall (more than one line) you can shorten it to one line and turn on Can Grow. If you don't and you can't turn on Suppress blank section, then the section will be at least as tall as the field is even if the field isn't printing.
-Dell