Please edit your question to include more information (e.g., which software are you using etc). The way it's currently written makes it difficult for someone to help you. A simple google search on how to validate a LC map returns many tutorials.

Thanks Nikolaos Tziokas for your valuable suggestions. I have included more information for better understanding.

Be welcome to have a look at field validation (key word: Rwanda) and validation by other maps (keyword Namibia) under my profile.

Conduct accuracy assessment

Great job, you can validate in two ways:

1. use Google earth or

2. Ground truthing (actual fieldwork visit with selected georeferenced points)