How to make the intention for Salah
In the name of Allah, the most Beneficent, the most Merciful
Answer
If you are praying by yourself it is necessary that you are specific with your intentions, in terms of the name of the salah and if you are praying behind an Imam, it is sufficient just to make the intention of following behind the Imam. (Raddul Muhtar p.95-p.98 v.2)
Only Allah Knows Best
Mohammed Tosir Miah
Darul Ifta Birmingham