As part of the Period End process, you should post your transactions for the period to your BAS (Business Activity Statement). Ensure all users are out of Attache when you run this process.
For a transaction to update to the BAS for both Customers and Suppliers it must:
Fall within the Transactions to Post date range (if specified).
Be after the Post to BAS Effective From date.
To check your Effective From date
Go to Setups, Company Setups, Options, Tax Options.
Check the Effective From date is prior to the date on all transactions you want to post to a BAS period.
Close ESC to close the Tax Options window.
To change your Effective From date
Go to Setups, Company Setups, Options, Tax Options.
Enter the Effective From date that you need.
Accept F9 to save the setting.
Re-update transactions
Once the Effective From date has been changed, update transactions again as follows:
Archive your data, because once transactions are posted to a BAS period, they cannot be removed from a BAS.
Run the BAS Allocations Report with Inclusions set to Transactions to be updated for the date range that you want to post.
You should check there are no additional transactions that have not been posted for ALL dates between the new Effective From date and the First Date you last used in the Transactions to Post range in BAS Update.
if other transactions appear that should NOT be posted to either the current or future BAS', these should be cleared by posting them to an old BAS so that they can never be accidently posted to a current BAS.
Check that only transactions appear that you want to post to the BAS you want to update.
Run BAS Update to update the transactions to the required BAS period using the same date range as used for your BAS Allocation Report in Step 2 above in the Transactions to Post Date Range.