I have a gas line coming to my kitchen .But there is no gas prssure there .Gas heater is working fine.I just bought that home.Occupants were using electric stove before.How I can check where this valve can be turned on to have the gas

Residential natural gas has only about 0.3 psi of pressure. Therefore very little. When you open the valve behind the stove - do you get any gas at all ?

Usually, gas valve would be somewhere where gas pipe is exposed and accessible, like basement, pantry or attic, sometimes it can be even turned off at the point of connection at the gas meter.

Residential natural gas has only about 0.3 psi of pressure. Therefore very little. When you open the valve behind the stove - do you get any gas at all ?

Usually, gas valve would be somewhere where gas pipe is exposed and accessible, like basement, pantry or attic, sometimes it can be even turned off at the point of connection at the gas meter.

There is no Gas at all .There is no basement or crawling space so very hard to say why this particular line does not have Gas

See if you can trace the pipe. Look in the attic, outside the house etc.