Fragrant Sumac (Rhus aromatica) is a native to most of the eastern USA. "Gro-Low' is the most common variety available. This video addresses pruning while dormant, which is focused on the 4 D's and managing the spread/width of the shrub. (Pruning for height & shape is done after it has leafed out and flowered).
The PDF handout that accompanies this video can be found here:
https://drive.google.com/file/d/1RXR_iktEaN1-8zzG7WULh2X3kVd91cNb/view?usp=sharing