Yes you can downgrade to use a QS at most places if asked, but no offense why would you want to waste a TS credit on a QS meal?? You don't have to eat at a table service restaurant every day to use your credits. Some are 2 credits so you could always not eat at a sit down on certain days and use the 2 credit places when you do.
Some of our fave 2 credit places are HDD, Le Cellier, Jiko, Cali Grill, HBD, The Boathouse (will be trying in Oct but heard all great things) , Artist Point, etc. So a few days we eat 2 QS due to all our 2 credit dining faves.
If you are taking about the deluxe plan than the credits are all interchangeable for TS/QS so you are supposed to use some on QS as well.
Regular plan has 1TS ,1QS, and 1 snack per day/night.
Deluxe plan has 3 TS/QS credits and 2 snacks per day/night.
You don't have to use them each day and can use whenever and however you want. If you want to use 10 snack credits in one day you could etc etc.
The amount of credits you get go by how many nights you are staying for your trip. So for example 7 nights/8 days you would get with the regular plan 7TS, 7QS, and 7 snacks per person per day. You can use them in any order you wish and however many you wish in any day you are there until you run out.
