You'll be filing an 1120-S tax return for the S-Corp. You can't do that online, or with a MAC. You have to purchase TurboTax Business (different from Home & Business) and physically install it on a windows computer. Then use that program to file your corporate tax return. Get TurboTax Business at https://turbotax.intuit.com/small-business-taxes/
Note that you can not even start your personal return until you have completed the 1120-S business return. This is because the business will be issuing all owners/shareholders in the S-Corp appropriate tax reporting documents they will need to report their gains/losses on their personal tax return.
