In order to use LMN's EstimateIDs in Quickbooks Online, you have to change a setting in Quickbooks online to allow you to use custom transaction numbers. Here's how to turn that setting on.
- In Quickbooks Online, click the Settings menu (it looks like a gear beside your company name in the upper right-corner of the screen).
- On the very left side of the Settings screen, click the Sales menu
- Go to the Sales Form Content section
- Put a check in the checkbox beside the Custom Transaction Numbers option
Now, your QB estimate IDs will match your LMN Estimate IDs on export.