it's beginning to dawn on me

[Attila]

Hi All,

Somebody called me and asked me whether I fixed a problem he told me about some weeks ago.
I didn't remember that issue therefore he told me some details hoping that I would remember.

After hearing the 2nd or 3th details I began to remember and said:

Now it's beginning to dawn on me
Is this a correct expression?

[Conchita]

Yes, the expression is correct, Attila, and can be used in the context you describe.