At this time, it's important to use appropriate synonyms for the phrase to sound more professional and add variety to your writing. One synonym for "at this time" could be "at present," which suggests the current situation without specifying a precise timeframe. The phrase "currently" can also be used in place of "at this time," implying that something is happening now. "Right now" is another synonym for the phrase, which emphasizes the immediacy of a situation. "At the moment" suggests something may be temporary or subject to change. Lastly, "at the present moment" connotes a sense of formality and can be used in more official or serious contexts. Using these synonyms can indeed enrich your writing.