On what I thought was correct

English as a Second Language English Vocabulary, Grammar and Idioms
1

Hi everyone,

Is this sentence correct: - I just wanted to confirmation on what I thought was correct.

Thanks
Alexandro.

2

My opinion
I just wanted to confirmation on for what I thought was correct.

3

Thanks E2e4

4

I just wanted confirmation <various prepositions will fit here, including about, on, over and for> what I thought was correct.
I just wanted to confirm what I thought was correct. (This is the form I prefer.)

5

Thanks Beeesneees.