Customer or Supplier transactions need to be updated to the BAS in order to be included in your BAS Statement when generated from Attaché.
The BAS Allocation report (from Customers, Period End, Customer BAS, BAS Allocations report, and/or Suppliers, Period End, Supplier BAS, BAS Allocations report) when run with Inclusions set as Transactions to be updated from the Options tab allows you to ensure that all transactions have been allocated to a BAS.
If you run your BAS Allocation report and find old transactions, this means your BAS for those BAS periods may have been wrong. If you find old transactions on your BAS Allocations report, you should:
Output the report to Excel.
Work through each old transaction and check whether it impacted your GST liability. It may be that:
The GST code was incorrect and there is no impact on your GST Liability.
The transaction was GST Free and will have no material effect.
Only transactions which contra each other out are listed, eg: invoices with credit notes.
You were using another method to prepare and lodge your BAS at the date of the old transaction and so it would have been included on your BAS.
If your GST Liability for any BAS period is affected, you should seek advice from your Accountant as to whether you need to amend your BAS.
Once your investigation of each transaction is complete, and you know whether you need to amend your BAS for any period, you can either:
Update the appropriate BAS period using a date range to control which period transactions are applied to or;
IF the transactions will have no effect on your GST Liability: Post to an old period that you did not use, or for which data has been deleted. Do this if you do not want to change the numbers on any of your historic BAS Statements stored in Attaché, and which you used to report to the ATO.