QB Issue Resolution:

The name field will auto fill as you type. You can click on the arrow (triangle in a box to the right of the field) to display all of the names. It filters those names in the list as you type, refining the search.

The list is filtered by the text to the left of your insertion point (the part that isn’t’ highlighted – usually this is what you already have typed).

Typing a : character will accept the current name and move to the next level (for job or sub job info).

Once you tab or click out of the name field the last used account for that name will auto fill as well.

Resolution for Issue 'When entering data in register, is there a way to utilize a drop-down that would automatically recall previous transactions for that customer?' available: Yes (Solved).
Source: Intuit Community forum.

When entering data in register, is there a way to utilize a drop-down that would automatically recall previous transactions for that customer?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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