There are a few things you can do to troubleshoot this issue. First, in Method go to QuickBooks > Synchronize. Check date and time of the last Changes-Only Synchronization and of the last Push. If these dates and times aren’t current, there is probably an issue with the sync engine.
Next, Still under the QuickBooks tab, click on the Resolve Conflicts tab. Check to see if any of the transactions are in conflict and not posting to QuickBooks. You can also check under the QuickBooks tab group QuickBooks Home > QuickBooks Dashboard. The grid labelled Non-Posted Transactions will list any records from Method which have not been posted to QuickBooks.
Finally, in order to have any of the estimates or sales orders which were created when the customer was still a lead sync with QuickBooks, you must uncheck the Waiting for Sync Approval? box and save.
These records will not be synced with QuickBooks until this is done.
If you are unable to resolve these issues, please call our support line at 1.888.925.6238 x2 so that we may assist you.