WHERE SHOULD I TAKE MY 9 MOTH YORKIE FOR HIS FIRST HAIRCUT?

It depends if you live in Calcutta, India or Brownsville, Indiana.
Late entry : but I guess both places are full of azzholes ready to thumb down inconvenient answers :))))
References :

Ask people you know who have their dogs groomed on a regular basis where they go and why. You want someone who is patient with puppies; it usually takes a couple of visits to teach them to have good grooming manners.
References :
rvtech

picking a groomer is like picking a hairdresser ask around and talk to other customers observe dogs exiting a shop see if you like the job they do
References :

Call the animal hospital/vet that you use- they can likely recommend one, or may even have one who does grooming at their site once a week or on a set schedule.
References :

My husband is in the army and we move a lot so I'm always looking for a new vet and groomer for my yorkie. When I move to a new town, I always to talk to the local pet store owners. They usually know which vets are great and which ones arent. Same with groomers. None of them have ever given me bad recommendations.

Also, many vets have groomers on staff. So if you like your vet, try their groomer out too. And dont worry, the hair always grows back.
References :

Be careful who you leave your puppy with ! i have worked in shops where They puppies where not handled right and this lead to grown dog that hated being groomed.

it should only take an hour or so to do your pup so see if they will let you drop off and pick up so the puppy dont have to sit in a cage and wait . these only make them nervouse.

ask if you can wait… not a great idea but some groomers will let you.
My first grooms on a puppy are start with a bath and i just turn on the trimmer if they deal with the noise I will trim under they're feet and tummy I might trim a little a round the eyes. and the blow dryer most dog don't care so the puppies normally do very well and some even like the blowers.

I don't recommend a groomer who will just toss your dog on the table and tie it down do the groom and toss it back in to a cage I know groomers are busy , that is why I sit time for the puppies first and second grooms Yes this cost the owner a little more money but they know the puppy is in good hands and will not be scared to come back.
References :

do some research on groomers in your area. I thought before I moved to Dallas I had found a new groomer but upon doing research and looking at the customer reviews they had a lot of negative reviews so please research online, ask your friends that had dogs that need grooming to find some a groomer that is reasonably priced and treats your baby well.
References :

Ask vet, pet stores or ppl whose dog you like the way they look.

Do NOT use big box grooming places. Use only actual grooming salons where grooming is their primary business & you will get much better care taken of your dog than by someone not trained correctly & trying to make their numbers for the week.
References :
30yr grooming