6 month old rottie keeps nipping to get attention. When I'm sitting reading watching TV few minutes later he will come over to me sit looking at me and start making his noise then bark and after that if I don't acknowledge he will mouth then nip or pinch to get reaction by me by that time he would have got tap on the noise or put in his crate or kitchen for time out til he calms down. Am I doing right thing or there any other ways so it sinks in or he just getting to that age where he just getting triant ???

> me by that time he would have got tap on the noise 

Do you mean nose?  If so please stop this, it is uneccessary and spiteful.  He has given you signs by looking at you.  You ignore, so he barks.  You ignore, so he nips.  He couldn't make it any plainer for you.  Always have something at hand to put in his mouth.  Be that soft toy, ball, whatever.  I used this method on a large dog and he now brings me a toy whenever he wants attention. 

If you are watching TV and he shows you that he wants your attention, try some basic seek and find tricks to help work his brain.  How much work does he have during the day?  I don't mean 3 hours walk, I mean mental stimulation (after all this is a working breed.)

> or he just getting to that age where he just getting triant ???

I don't understand this term.

Don't put him in his crate as a punishment for his actions. Are you also using a crate at night, to travel, or when you are not in the building? - by shutting him in when he needs to just "calm down" you are making his special "personal place" somewhere not pleasent by associating it with punishment. It needs to remain a positive place for travel, bed time etc.

Sorry it doesn't help with the nipping, but crates should never be a place for punishment. They are great training tools when used correctly.

he would have got tap on the noise

Do you mean nose?  If so please stop this, it is uneccessary and spiteful.

plus it can also make him 'head-shy' and even escalating to snapping at a hand when it goes towards his head

You've been given a lot of advice, I would say before you settle down to read, watch TV is to spend time with him, some training and then settle him in another room or his crate with a toy/kong etc and make sure he is settled before you go and do what you want.
Do not please do the tapping on the nose.
If you have him in the room and he starts barking/nipping hand him a toy, if that doesn't work remove him without saying a word and place him in another room straight away for a minute, no longer and then being him back in. You may need to do this 20 plus times but if you are consistent with it then he should get the message that by barking/nipping will have the opposite effect.
Have you spoken to his breeder yet? If they are close then I'm sure they would be happy to pop round and help.
Are you still going to training classes? If not get back on them and hopefully it is reward based training and one the trainer should be able to offer advice because sometimes the written word isn't exactly how it's happening, so you can describe something and we can take it as something else.
By now he should be having a lot of training during the day: maybe teach him something else, scent trails, hide and seek with treats etc.
Can you hide a lot of treats in a room and then let him in to seek these treats out..

The link I've supplied has a good book on dealing with adolescence. I gave both books in my puppy packs. Worth buying as it has some good tips in there

http://www.lynfleet.com/shop.html

Do you mean defiant? Please do not tap his nose!

I think so. Think he's getting testing age. Stopped the nose tapping. Last night played with his toy fetch but he then gets bit over excited and pinches and that's when I put him in the kitchen he instantly lays down and goes sleep I assume he knows it's time out but I'm trying to find new games to keep him interested. Like today bought couple tennis balls made slice in it and stuffed with treats ready to give him tonight to play with. Oh and I know this ain't behaviour related but I'm stuck on this. When he was smaller I had to pick him up to put him in the boot and now bigger and able to get in himself he still exspects me to pick him up in there which I am cos I've tried luring him in with a treat no luck I even ended up in the boot with a treat to get him in and all I get is the dog sitting there looking at me and people walking down my street looking at me like mad man haha

Clicker training would work with this - not instant - click for standing close to boot, progress to nosing it, one foot on lip, two feet on boot lip etc.
or try steps/ramp so he can walk up.

Well seems the tennis ball stuffed with treats is doing the job keeping him busy. I think the ramp maybe the best thing

How about practicing a jump over tiny jumps indoors/in the garden before progressing to the car?  Then you'd have the basics of a jump in on cue and you could add it to the training.  Nothing huge, he's far too young for repetitive jumping but maybe get some cavaletti poles so you can get him used to jumping on cue.

As he is still a puppy and growing I would think that helping him in and out the car should continue to ensure he doesn't damage his joints.

I help mine in and out until 1yr, especially if it's high.. Different if it's a low vehicle at the rear