I need some changes to an existing website

Step 1- Create the tabs on the settings page, we will be working on the Markets tab only. When you initially click into Settings > Markets > you see a '+' symbol to add a new market connection. When you select +, it will open a modal with a dropdown for Markets (Amazon will be the only option right now) and a dropdown for Country Code (US, UK, CA, etc). Once Amazon is set, and country is set (US for example), they can click the save button. When the save button is selected, it will close the modal and put the Amazon US MWS/AWS input info on the Markets page (similar to products/users, it will be a line item). For any country on Amazon, we will show 2 sets of fields (MWS and AWS). MWS shows - SellerID, Access Key, Associate Key (secret key), Marketplace ID. AWS shows - Product Advertising Access Key, Product Advertising Secret Key. Then can save this page and it will update the SQL tables with the information. (company specific) Step 2- On the products page, when you edit a product, there should be a tab created when the new market above is added. US for example. This country tab will contain all amazon related info needed to post a product to Amazon. Here is a list of fields - Fulfilled By (this will be Amazon or Merchant) ASIN TaxCode Condition ConditionNote Title Brand Description Bulletpoints (have 1 field, then a small + symbol to add up to 5 total) Search Terms (have 1 field, then a small + symbol to add up to 5 total) Length Width Height Manufactuer MPN (manufacturer part number) Quantity Fulfillment Latency Min Price Max Price SellingPrice Step 3 - On that same US tab of the product, there should be a menu with the following options - Post Product to Amazon Post Quantity to Amazon Post Price to Amazon Post Images to Amazon The post products will send all data to them. Post qty, price, and images, will only send that specific data.