The customer asked if there is a way to import Toolset's checkbox/checkboxes type field data, using the WP-All-In-One Import plugin.
Guided that there is no direct method available for this type of import but shared a workaround that is known to work:
This is the technical support forum for Toolset - a suite of plugins for developing WordPress sites without writing PHP.
Everyone can read this forum, but only Toolset clients can post in it. Toolset support works 6 days per week, 19 hours per day.