Knitting

My pattern tells me to decrease at the neck edge but don’t have any method. Can I knit together

Sure, k2tog will work. If you’re working with decreases on either side of the neck however, you might test a k2tog (right leaning) and a ssk (left leaning).
Use one on one side of the neck and the other on the second side.

Thank you for your reply, tried it and works out fine.