Hello Shang06,
one option would be for example:
open the posted Sales Invoice list
You can add the collumen for Sales persons for example by using the personalisation functionality:

You can set additional filter:


If you want to see withou filtering on paid or unpaid in the following columns if the invoice is paid or not:

If the invoice is not closed = unpaid
If the invoice is closed, but canceled = closed with a credit memo
If the invoice is just closed = paid
You can check the combinations by selecting the filter e.g. for paid:

I hope this helps.