Hi @JoshM23 ,
In that case, I can recommend the Synkro: Inventory sync app (https://apps.shopify.com/synkro) which includes a “same store location syncing” feature. With this, you will be able to connect your POS and Online inventory locations together within Synkro so that any inventory change which occurs at one location will sync to the other location for the same product/variant in real time.
For instructions on how to set this up, please refer to this page: https://synkro-app.com/documentation/sync-inventory-between-locations
I am the developer behind this app, so please let me know if you have any questions and I will be happy to help you get everything set up 
Eric