Hey everyone, is there a way to link sales orders to invoices just like how POs can link to bills?

Start creating an SO then generate an invoice from thereon. Although creating an invoice first and then associate a sales order won't work at least in the UI.

Hm I was wondering if there was a way to see in related records or something to link back to the original SO when viewing a invoice

It's possible the field may be hidden on your form, but an invoice should have a Created From value that links back to the SO if the invoice was created from an SO. It won't have that field filled in if it's a standalone invoice. Similarly, on the Related Records subtab of an SO, you should be able to see invoices created from it.

Oh okay. I agree with @rsm_ryan_meyer. The Created From field is hidden or your invoice is standalone if that's empty.

thank you both for the replies! of course I should have checked if those values were there.. they were both hidden for some reason. thanks again!