Magento website project - 4 features/Bugs that need resolved.

**We need help resolving 4 errors that we have with our current Magento website project. Our Current Developer has made himself available to help explain further the issues at hand as well as what has been tried already.** website: <[login to view URL]> U: marlinbrook P: p@ssw0rd **The project is at [login to view URL]** **- checkout accepts fictitious addresses. Refer to email Marlinbrooks: New Order # 1000021** Work with us to resolve a few lingering Magento issues. We are close to wrapping up a project and have a few bugs and features that are incomplete. The First is related to FedEx address validation. After using the default method for implementing FedEx, address fields still will not validate. City, State and Zip code will validate but not the address fields. We have resorted to manually modifying Magento with the provided PHP code that was provided by FedEx but have not had much success. - **gift cards are taxed. They should not be.** Currently we are managing Taxes for NY residents only using a plug-in called Avalara. It's set to Tax all products for residents with NY address however the project calls for an exception to this rule when one purchases a Gift card. (Digital Good) We are looking for an exception rule to be added to the plug-in or site to facilitate this. - **when the gift card credit is greater than the product cost, shipping is no longer free. On checkout page, shipping charge appears in shipping section and order summary section (see [login to view URL]). Then go to MY BAG and see shipping charge in MY BAG (<[login to view URL]>).** - computation error (see <[login to view URL]>)