I got my futa potion but I cannot find a way to give it to the girl to make it a girl nor can i give the potion to any other futa
That could be for boys.
For the one futa girl you had to agree to make her a full girl and it would have open up the futa cure potions.
There are 2 paths to take in the futa potions, 1 is changing all girls to futa or futa to girls and 2 changing futa to boys or boys to futa.
Search my name because I uploaded a change to the xml that allows both ways to work like it use to in 1.9.4, they changed it in 1.9.5 to only 1 gender at a time per playthrough. (The upload would allow for single gender games if players wanted to go that way, just rememember that most if not all quest require that boys and girls are needed for the quest to complete. Once the quest is completed then you can do with them as you want.)
Nothing has changed in the futa potions from 1.9.5 to 1.10 so it should still work.
Its been a long time ago since I played and I am waiting for about 1 more week before playing again so more bug fixes can be done.