Please advise me how to upgrade from 8.0 to 8.2 update 3 with WFFM module in local and also UAT and PRD environment.
What would be the following process step by step.Please suggest .
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You'll find several blog posts on how to upgrade, but I can provide here the initial steps.
I strongly advise you to read through all the provided documentation. Also, you need to know that you'll have to update legacy/deprecated code in your Visual Studio solution, Sitecore modules and etc.
The upgrade guide tells you the minimum you need to know.