Question: How should the feet be positioned in Sajdah?

Answer: There is a difference in how  males and females will position their feet in Sajdah: 

Male 

When in Sajdah, the feet should be placed on the ground, close to each other with the heels touching  and the toes facing towards the Qiblah.(Shaami vol.1 pg.476/504

Female 

The feet will be placed on the ground outwards, facing  towards the right. The feet should not be kept upright. However, the toes should face the Qibla. [ Behishti Zewar Page 159]

And Almighty Allah Knows Best 

Yusuf Moosagie