After entries have been completely or partially closed – during posting or afterward – you can see the entries that a given entry was applied to in the Applied Customer Entries window.
Open the Customer Card window.
Click Customer, Ledger Entries.
Click Entry, Applied Entries.
Allowing for Rounding Differences when Applying Customer Ledger Entries
Allowing for Application of Customer Ledger Entries in Different Currencies
Viewing Applied Customer Ledger Entries from the Window with Open Entries
Unapplying Applied Customer or Vendor Ledger Entries