AutoComplete (A Money feature that automatically fills in a payee, category, classification, or account name you have used before once you start typing.) helps you quickly type text in a transaction field. It completes an entry as soon as you type enough characters for it to be identified.
Why does all the information fill in automatically?
If you enter a payee (The individual or business to whom a check is written.) who was used in a previous transaction, Money will also enter the information from the last transaction that involved that payee. If you want to change the information, just type over it.