The IRS matches the SSN and the first four characters of the last name.  The IRS has a standard convention Intuit needs to follow for converting last name such as the one you mentioned where there is a space in between.  So long as you have entered your client's last name as on the social security card, you should be fine.

In case you want to find out more about the convention, you can refer to the bookmarked section of this article: https://www.irs.gov/pub/irs-pdf/p4164.pdf#%5B%7B%22num%22%3A771%2C%22gen%22%3A0%7D%2C%7B%22name%22%3...