Software recommendations - Sales Credits

My company is looking for a stand alone software that will interface with our ERP system. The purpose of the software is to allow users (sales force in particular) to submit the credits they give to their customers online; this will also eliminate the paper intensive system we have now.
We use a traditional expense software now (Concur) which is great but it doesn't give us all we need.
Any suggestions?
many thanks!

I suggest google. It's a fine website.

Thanks, I've been googling all morning long...I'm turning to humans now.

Oh, well then I dunno. lol