Hi maiphuong
Welcome to the MYOB Community Forum, I hope you'll find it a wealth of knowledge .
The Aged Payables Report will show all open purchases within the company file and ages them according to the date you are entering as the As of Date. If you are expecting to see a transaction listed and it's not, do ensure that the transaction is open i.e. not fully paid.
If you are referring to adding the supplier invoice number to that report, this can be done by selecting Insert/Modify>>Show Hide in the Report Columns section>> Supplier Inv No. (left-hand-side)>>Show> so it appears on the right before selecting Ok.
Let me know if you require any further assistance with this. I'm happy to assist you.
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Cheers,
Cel