Welcome - @Joeotto55 I wouldn’t post personal information within these forums. When you get a chance check out our guidelines it will help you moving forward.
About changing your shipping address I believe our Customer Care team will have to change that on your behalf. Here’s the Customer Care link below. You can also contact OfferUp through Twitter at OfferUp if this option is available to you. Regards Hotrod
OfferUp Customer care