As of April 2021, the MLA Handbook is in its 9th edition. Some classes and professors may still be using the 8th edition, though.
Tip: Pay attention to the edition offered by citation generator and management tools, and choose accordingly.
This site can also be helpful for learning to use the MLA citation style: Purdue OWL: MLA Formatting and Style Guide
Use with caution. Not all citations are 100% accurate. Some miss finer details like capitalization or punctuation. Proof the final citations according to a style manual.