diff --git a/BUGS b/BUGS
index 255b531..2fad86a 100644
--- a/BUGS
+++ b/BUGS
@@ -1,2 +1,5 @@
-when I cancel items, the changes need to be reverted for:
-    new bill, new bill type, change bill
+when creating estimated bills I use last_bill amount as a base, but for monthly
+bills that are older than last_bill, I should really use the nearest 'last_bill'
+e.g. bill from 1/1/2020 $100, 1/1/2021 $110, then I should not fill out all of
+2020 with $110, instead should be $100
+