Question

change the voice of I was not informed about the new project

Answer 1

They did not inform me about the new project.

Here's your answer mate hope it helps ❤✔

Answer 2

The sentence," I was not informed about this project." is in passive voice.

In passive voice, the the person or the agent or performer of the action becomes the object of the sentence and the action being performed becomes the subject.

The opposite of passive voice is active voice.

Here the agent or the noun phrase becomes the subject.

The active voice format of the sentence would be, "They had not informed me about the project."