I have entered different names for the same customer/supplier in the Details field. How do I know which is the right one to select when I start typing into the Details Field?
When entering new Receipts, Payments and Transfer transactions, you enter a 'free-text' label into the Details field to describe or identify your transaction. CT will try to match this with all your previous entries as you enter text into the field, eg.. "ABC....". It doesn't matter what you enter here, and so if you select one from the suggested entries, or type a new entry, this won't have any impact on your accounts or [most*] reports.
However, we understand that you may want some consistency with your entries in the Detail field to help you find and identify transactions (*we've also recently introduced the new Transactions Reports which uses this field). For example, if you have entered "The ABC Company" & "ABC Company Ltd" in separate transactions which are both referring to the same entity then you may want to rename these so they are all the same.
Depending on how many entries you have, you could use the Receipts and Payments page, click "All Dates" button and enter your search text (eg. "ABC") into the "Search: All Text Columns" field. This will return all matching entries which you can open and edit. (If they are locked, you may need to temporarily change your Financial Year to an earlier date and/or Unreconcile them to unlock them).
Alternatively, if you have many entries you can use the "Mass Transaction Change" page (Setup menu) which allows you to make multiple changes to transactions at the same time.