The place of sujud al-sahw: before or after the taslim

Question:
Honorable Shaykh, may Allah grant you success, is it permissible to always perform the prostration for forgetfulness before the taslim?

Answer:
It is permissible to prostrate before the taslim; it is equal to prostrating after the taslim, and it is permissible after it as well. However, the best is that, regarding the prostration for forgetfulness due to a deficiency in the prayer, it should be before the taslim; this is the best because it is a completion of the prayer. If the prostration for forgetfulness is due to an addition, the best is that it be after the taslim, because the prayer does not need to be completed, rather it is to deter the Shaytan, so it is after the taslim. But if he reverses it, leaving what is after the taslim before the taslim, or what is before the taslim after the taslim, if he reverses it, that is permissible. It is permissible to prostrate before the taslim absolutely, or after the taslim absolutely, and the distinction is only in what is better.