YouRelated can add a new Bill or Credit from the top of the bill or credit list, or using the hovered plus on the left nav bar.
Tutorial(s):
By default a new payable will create a draft, so if you try
Select the Property/Company that the Bill or credit will be associated.
Next Select the Vendor, or
If you had paid this vendor before under this property/company the Expenses list will automatically populate with coded expenses based on the last bill that you entered for this vendor