I wanted to clean the desk, because there was no room for anything on it.

I, also, wanted to clean it because when papers where put down on the desk you could not find them later that day.

Are these two sentences correct?
Do you also put commas saying I, also,
I'm not sure if it needs the commas.

I wanted to clean the desk because there was no room to put anything on it.

I also wanted to clean it because when papers were put down on the desk I could not find them later that day.

Compare VERY carefully so you catch all the corrections I made.

Yes, both of the sentences are correct. When mentioning multiple reasons for wanting to clean the desk, it is appropriate to include a comma before and after the word "also" to separate it from the rest of the sentence. This helps to emphasize that "also" is an additional point being made.

Therefore, the correct way to write the sentences would be:

"I wanted to clean the desk because there was no room for anything on it.

I also wanted to clean it because when papers were put down on the desk, you could not find them later that day."