>That'll only do part of it, if your purpose is for everyone to get the same number of days. What about those who renewed on January 15, 2000? GOMONTH(oldate,12) will bring them to January 15, 2001, which is 1 day longer than someone renewing on March 15, 2000, since the January renewal gets the 02/29/2000 for free. Try this:

? {^2001-01-15}-{^2000-01-15}
>? {^2001-03-15}-{^2000-03-15}

Better to just add 365 days to the date and be done with it.

Yes, I had to apply a logic to it.