Welcome Sally!!

Are you certain that there is NO place for her to be separate for a while until she feels safe enough to actually GO TO the litter box to use it. The problem may not be that she does not know how, the problem might be that she is intimidated.

Biddy came to me directly from a life outdoors. And he missed the litter box the 1st 2 times, but he got close (Front in, back not in) And being an intact adult male I was REALLY worried, but he did fine. And so should Sally.

Did I see it coming??????????????
When am I adopting again??????????

Let me know how she is making out.