This was driving me nuts last week. I could not figure out why, no matter what parameters I used, no documents were presented for write off in Write Off Documents (Sales>>Routines>>Write Off Documents). So, to the Dynamics GP forum I went. Tim Williams kindly set me on the right path. On the Customer Card, under the Options button, if Maximum Writeoff is set to zero, you won't be able to write off documents for this customer. For this particular client, ALL customers were marked to not allow write offs. Thanks Tim for the great tip!