Make sure you have hand-feeding formula and a brooder put together so that you know it maintains heat. A freshly hatched amazon chick may need a brooder to maintain heat at around 96-97 degrees. Just in case you need it. You never know with first time parents.
Otherwise, I fed my yellow napes huge heaping amounts of food. Unlimited amounts of whatever they wanted. Mine tended to want what they want when feeding their babies. Meaning, if they wanted cooked corn, and I didn't have cooked corn, but offered all sorts of other healthy options, they would still not feed their babies very well. When it comes to parent birds feeding chicks, its best not to judge their choices too much. Just give them what they will feed assuming the chicks can digest it. Mine also tended to like sprouted seeds. I get sprouts from chinaprairie.com and sprout them at home. Do NOT get sprouts from the grocery store as they tend to be full of bacteria. If you want to sprout, read up on it. You don't prepare them like you would for a human. I also gave some pellets and regular seed as well. Also cooked sweet potato or cooked squash and the usual assortment of other fresh veggies. I also cooked until soft brown rice, quinoa and beans. Sometimes I had different foods in different bowls. I also did A LOT of thawed mixed frozen veggies. The top two favorite things mine liked to feed their chicks were thawed sweet corn, and sprouted seeds. I sprinkled a little bit of Nekton vitamins on the soft food just because I was worried about all the corn they were giving to their chicks and didn't want the babies to get calcium deficient. Note, not giving corn, caused the parents to just not feed babies very well. So, pretending I knew better than them and attempted to restrict their food to what I thought they should eat, would have resulted in stunted chicks. The babies turned out to be normal sized healthy birds. I pulled all of mine for hand-feeding somewhere between 10 and 28 days or so. Which may have made a difference if they had any marginal nutritional deficiencies. Most of the time, I used Kaytee Exact regular formula with good results.