ANZ Import file
This file can be imported directly, line by line. You don't need to remove anything.
If you have created any cheques in cheques/payments delete the matching cheques from the list. Don't import them.
If a cheque is in the download file, and you need to create it with multiple detail lines, you may create it here, then switch to Cheque Entry to complete the entry. Change the first line to match the actual first line and add lines to bring the total for the cheque to that required.
The ANZ import file has the oldest transactions at the bottom of the list. Start your import there if you intend to import cheques because the cheque numbers in the file are used can match the numbers that Retail Business would other wise generate.