How can you prevent duplicate entries in QuickBooks?

The option to use the "Check for Duplicates" feature while entering transactions is an effective way to prevent duplicate entries in QuickBooks. This feature actively scans for existing records that match the data being entered, alerting the user to possible duplications before they are finalized. By addressing this issue at the point of entry, users can save time and avoid the complications that arise from maintaining multiple records for the same transaction.

In contrast, automatically reconciling accounts or reviewing account histories are good practices for maintaining accurate financial records, but they do not directly prevent duplicates during the entry process. Merging entries addresses existing duplicates rather than preventing them at the onset, which does not help in stopping duplicates before they occur. Hence, utilizing the duplicate checking functionality is a proactive measure tailored specifically for that purpose.