я не смогла вам сообщить, т.к. эта

я не смогла вам сообщить, т.к. эта информация не доступна официально.
Она есть в межведомственной переписке

Results (English) 1:

I could not tell you, since this information is not available publicly.It is in the interdepartmental correspondence

Results (English) 2:

I could not tell you, because This information is not available officially.
It is in interdepartmental correspondence

Results (English) 3:

I would not have been able to inform you, because this information is not available officially.
it is in the interdepartmental correspondence