There are at least five places your iPhone will pull your home address.
You added a home address in Google Maps section if you followed a previous tutorial
You added a home address in Text Replacement section if you followed a previous tutorial
Three more places to set:
- Go to Settings > Apple Id Etc. > Payment & Shipping.
- Go into Settings > Wallet & Apple Pay and add your Shipping Address option.
- SIRI pulls your home address for your personal entry in your contacts. Go > Contacts> edit your own entry in order to make sure it’s current.