You can't do it from home. You have to go to your store, log into Ehr. On left click on Job Opportunities. Follow prompts from there. You will end up having to select a store or stores you want to apply at. If you find the correct one you have to make sure they have an opening for it. If not, their HR needs to go in and create the opening.
Have you spoken to another store about transferring?
Your app will go into their internal applicants system so make sure they are aware that you've applied. HRs usually don't check this very often. Stay on top of them. Things like this do fall through the cracks or get put on the back burner.
Any other questions, feel free to ask. I was in HR for 6 years.