I don't think shipping and billing info has to match, but since nothing is being shipped, that shouldn't be a problem. Just click the box beside where it reads, Copy Billing Information to Shipping Information. Make sure the address you provide is the one that you have given to the credit card company.
When it comes to shipping addresses, you can provide your credit card company/companies with other addresses that you will be having stuff shipped to. The credit card companies must have these other shipping addresses on record, or they will decline the transaction.