Hi,
You chose your own intake and, with testing, religiously before and after meals, be prepared to reduce your intake. Are you currently testing your meals, or don't you have a meter? If you don't have a meter then you need to buy one. Look for ones with the cheapest strips because you need many thousands of strips. We all have different tolerance levels to carbs, so you need to find your own. You could start at 80g or 100g a day, then work downwards from there. Most T2s on here are 50g a day or less.
Test immediately before you eat
Test again 2 hours after first bite
Look at the rise from before to after and try to keep it under 2mmol/l and preferably less.
If it is over 2mmol/l there are too many carbs in that meal for your body to cope with.
Keeping a detailed food diary helps a lot.
Measuring carbs isn't easy at first, but it becomes second nature. You have to learn to read nutrition labels for the Total carb content per 100g. Then you measure or weigh the portion size you are eating and calculate how many grams. If there isn't any packaging, such as with fresh veg, there are excellent supermarket websites to help, such as Tesco and Sainsbury. There is also a brilliant book (and app) called Carbs & Cals available from Amazon. You also have to watch out for hidden carbs in things such as sauces, gravy, milk etc.