As required is a common phrase used in various situations to denote that something is necessary or must be done based on the circumstances. However, there are many synonyms of this phrase that can be used to add variety or clarity to your writing. Some alternatives include "as necessary," "as needed," "when required," "in accordance with," "following the dictates," and "as per the requirements." Depending on the context of your writing or speech, there may be other synonyms that could be more effective in conveying your intended meaning. Experimenting with synonyms can help improve your communication skills and create a more engaging and nuanced message.