Did/Have you change(d) anything?

[Yueehs]

Hi, which one of these is correct?

1) I can't see Alan's details in the Infotech system, did you change anything?
2) I can't see Alan's details in the Infotech system, have you changed anything?

 

[Barque]

Neither is correctly punctuated. You have a comma splice in both.

I can't see Alan's details in the Infotech system. Did you change anything?
I can't see Alan's details in the Infotech system. Have you changed anything?

 

[emsr2d2]

Hi, which one of these is correct?

Hi. Which one of these is correct?

You have a comma splice in the opening sentence too. If you feel the need to write a greeting (it's unnecessary, by the way), follow it with a full stop. Start a new sentence for your question.