Combined Invoices and Quotes allows you to merge multiple Invoices/Quotes for the same contact into one consolidated instance.
To combine invoices in the Web Portal > Accounts > Invoices > Select the Invoices you would like to combine, ensuring they are for the same Contact > Select Combine >A Preview window will appear for you allowing you to select Combine to Quote or Combine to Invoice > The consolidated Invoice/Quote will open for you to confirm the details > Save.