I just change my oil about a month ago and now it's saying add a 1quart of oil

How many miles have been driven since the oil change? Are there any signs of leaks on the ground where you park? Also, check the level on your dipstick. And if you slightly underfilled at the last change, it may not actually be a whole quart, but 1/2 quart, or something like that. After an oil change, you should run the engine for a few minutes, then shut it off for a few minutes and check the dipstick reading.

just check the oil,if it's low add until full,do not overfill. wait until you have to have work done on it,say for instance the valve cover gaskets are leaking oil...$900.00 labor to put $50.00 worth of valve cover gaskets(2) on!