Finding the right amount of carbohydrate depends on many things including how active you are and what, if any, medicines you take. Some people are active and can eat more carbohydrate.
Finding the balance for yourself is important so you can feel your best, do the things you enjoy, and lower your risk of diabetes complications.
A place to start is at about 45-60 grams of carbohydrate at a meal. You may need more or less carbohydrate at meals depending on how you manage your diabetes.
Regarding Sugar the Association says:
It’s best to save sweets and desserts for special occasions so you don't miss out on the more nutritious foods your body needs.
A Treatment for Diabetes
Adopt a very low carbohydrate diet.
Focus on reducing insulin resistance, because that's the cause of the damage to your beta cells.
It's suspected the added sugar in the diet, perhaps fructose in particular, causes non-alcoholic fatty liver disease, that damages the pancreas and the ability of beta cells to produce insulin normally.
The Public Health Effect of the S.A.D.
Rapidly Rising Type II Diabetes Rates
Official Advice from the American Diabetes Association is Nonsense - Do this instead:
Limit carbohydrates to no more than 12gm per meal. Less that 50gm per day.
Eliminate added sugar, and sugar alcohols, from your diet completely. Sugar is not a "nutritious food."
If you follow the last two lines your blood sugars will be stable, your need to use insulin will be minimised, and if you are type two diabetic, your diabetes may well disappear.
A Completely Misleading Diagram from a Diabetes Association
The message is that type 2 diabetes if a very complex, progressive, lifelong disease, that will have to be managed for the rest of your life by medication.
The truth is that if you limit your carbohydrate intake, blood sugars can be very stable and your type 2 diabetes may simply vanish.