You are not the original poster who started this thread. My screen shows the original poster is using TurboTax Business, which is completely different from Home & Business. So of course, the answer may be of no use to you.
There's nothing to merge. You have to physically type in data, click buttons and the such. You can file up to 10 SCH C forms with your personal 1040 tax return completed with Home & Business. After you work through the first business all the way to the end, you are returned to the summary screen that lists all of your businesses. At the bottom left is the button "ADD ANOTHER BUSINESS". See attached screenshot in my answer above, for what that screen looks like.
