u/LowRefrigerator6455

My elderly dad is moving to Washington State to live with me this month. He currently resides in Illinois and was qualified for in-home caregiving as well as other benefits (though it was a joke and no one ever showed up). I understand that we need to cancel all of his benefits in IL before we can reapply in WA State. Does anyone have any tips or suggestions in regards to services or things that I should ask for and who I should reach out to. I only know that I need to get him set back up with medical (DSHS) and reapply for home caregiving services. All tips and tricks appreciated.
Also, has anyone had a strange experience calling the Federal phone number for SS? I cannot get through at all. I can only reach our local office.