I’m what stage of cellular respiration is most of the carbon dioxide produced?

The “light cycle” or Krebs.

The Krebs cycle or the TCA cycle produces
2
C
O
2
for every
1 molecule of acetyl CoA
.
This occurs in Step 3 and Step 4 of the Krebs cycle.
In Step 3,
isocitrate
is oxidized to become
alpha-ketoglutarate
by the rate-limiting enzyme,
isocitrate dehydrogenase
.
In Step 4,
alpha-ketoglutarate
undergoes a redox reaction, oxidizing to become
succinyl-CoA
, also releasing
C
O
2
in the process.
Each step generates the coenzyme,
NADH
, an electron carrier which is going to be important in the next stage of cellular respiration, the electron transport chain.

It may have some of the same features that it’s mother does but, it may have some of the same features that it’s father has as well.