1) Check the text editor that you are using to format the document. Make sure that the spaces and/or tabs are set to the proper setting to make sure the paragraphs are properly formatted.
2) Make sure that you are using the correct character for returns, usually the Enter key. Also be sure to hit the Return key twice to create a paragraph break instead of just once.
3) Use the Style function on your text editor to reformat paragraphs. This will help make sure that all of your paragraphs are formatted in a uniform way. You can then save your changes for future use.
4) If the document is still not formatting correctly, you may need to reset the formatting of the document. In this case you will need to use a text editor that has the ability to reset the formatting of the document.