Client sold his business in 2015 in an installment sale. Payments were supposed to be made through July 2020. TP did not receive any payments in 2019 and the buyer isn't planning to make any more payments.

I have an email in to the TP asking if he is taking any legal action. Knowing the TP he may not be.

How do I report the loss from this installment sale? Do I delete the F 6252 in the 2019 program and report the loss in the top section of F 4797?

I searched the help section to see if this has been addressed in the past but no results were found.

Thank you for your help.