I have searched and can't find anyone discussing this. I noticed when I ran the cash sales tax liability report that I showed invoices that had been paid during the period from an odd city for that time of year. When I clicked to see what invoices were included in that amount, it showed an invoice from 2 years ago that was partially paid at that same time. I finally figured out that in December of 2019, I wrote off the rest of the invoice through the receive payments window and the amount I wrote off is what is appearing saying I owe tax on that amount.  I realize that I can simply make an adjustment for the tax amount but that is not my concern. I don't want other written off amounts showing because I never would have noticed this, had I not questioned that city showing up now. There are other invoices that were written off, so I am sure they are showing as well in our most used city, but that would be alot of invoices to look through. I must have a setting wrong but if so, I can not find it. I have my sales tax method set to cash. However we were switched to the cash method byt the state 2 years ago and were using the accrual method prior to that.