I somehow closed the job and I tried to go back in and add the receivable but it is not allowing me.
It can be done in the job management sidebar.
Roll down the job status list and select Revert to Started. It will reopen the whole project in case this was the last job, so you'll be able to edit receivables.
Hasn't the task been added to an invoice by any chance?
Normally, when you cannot add a receivable that is the case.
I had to delete the item under the invoice and then go back into the assignment. Thank you for pointing me in the right direction. I figured it out!
Customer support service by UserEcho