Opening a Bank Account in the US for Incorporated Businesses
One of the first things that you need to do after starting a business in the United States is to open a bank account for the incorporation.

What should I provide to open a bank account for my business?
Generally, most banks ask for the following to start a new account: the authorized certificate of incorporation (or the operating agreement for the LLCs), federal tax ID number (a.k.a. EIN) and the presence of a corporate member or the owner of the business.
The banks in the US are regulated mainly by the federal law; however, the state laws also apply to the banks. In this respect, banks may ask for different documents in different locations and depending on the self-regulations of the banks themselves. Therefore, it is important to take note of the required documents before starting the process. You may prefer to call the bank for further information or just to make sure that you are on the right track. For the most part, banks ask for the presentation of the documents below:

Certificate of Authority: This document can be translated as the Foreign Qualification which enables enterprises to do business in other states than incorporation. This is required due to the fact that the companies in the US are regarded as foreign companies in other states than incorporation. Hence, if a company wants to do business in other states in the US, it has to obtain the Foreign Qualification to lawfully operate. Banks require this document to open a business account for companies operating in another state. Foreign Qualification is important before the banks since the revenues of a company are transferred to the banks. In order not to face tax related problems, Foreign Qualification must be obtained.
Different states may apply different rules and qualification to obtain Foreign Qualification. You can get a professional help from us in this respect.
Certificate of Good Standing: Also known as the Certificate of Existence, this document confirms the good standing of a company which means that the company has paid all its taxes and has a registered agent whose fees are paid. Most banks demand this certificate for credit applications and starting a corporate bank account. Also, companies may need to present this certificate before signing important business agreements.

Do I have to open a bank account in Delaware if I incorporate there?
No, business people generally open bank accounts where it is easier for them to manage their bank accounts and this is mostly the state where they conduct business. Most of the companies in Delaware do business on a global scale or at least on a multinational basis; therefore, the banks in Delaware understand their needs. In this case, opening a bank account in Delaware even though you do business elsewhere is smart due to the manageability of the account.