We may need a bit more context to thoroughly answer your question but I’ll give it a try. 1) It’s so late for me This may refer to a point in time. For example, if someone wants to meet you for a date at 10 pm, you may be able to meet them but that may be so late for you that you’d prefer not to go (perhaps you normally get ready for bed about that time). [Es posible pensar de esa frase tan (¿como?) “tarde.”] 2) It’s too late (for me) This may refer to an event being over so you can’t change what’s happened. For example, I wish I had studied harder for the English exam, but now it’s too late for me. In other words, the exam has already happened and it’s too late to study any more in order to pass it or do better on it. It’s simply “too late.” [Es posible pensar de esa frase tan (¿como?) la situación está terminado y no es posible hacer más]. There are other interpretations but I believe this may capture the meaning you’re looking to find.

I think both ways are correct.

Sometimes I see "so late for me" and sometimes people tell me too late? what is the difference? Help me please So late > late to such an extend that you find it to be not reasonable. Too late > late till you cannot wait till that time. > You were lucky that even though you came so late, it was not too late.