I'm trying to say something about my project update. which tense structure should i flow or consider
Actually after two to three days work i have to describe what i did so far. so which tense structure should i consider to describe what i have done.Expect example and why i should flow the guideline.

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Your question is a little confused, but if I have understood it correctly, I think you may have answered it yourself:

You need to describe what you 'have done' in the project. When you are talking about what has happened so far/up till now in an unfinished task, then the present perfect may be the best tense.