I need to match the subform data to the mainform data. for example, I have a programmer id 11111. I need the subform to display all the information that relate to this id number.

I need a solution urgently.
Thank you

The subform properties should have Link Master field: [ID] and Link Child field: [ID].

If you made the subform using the wizard, there was a step that asked you which field in your subform would link the subform to the main form.