I received a Schedule K-1 (Form 1120-S), however I cannot determine how to enter this information into Turbotax, as it seems to only support Form 1065 for K-1s.

To enter your K-1 (Form 1120-S) information,  follow the instructions provided below:

TurboTax Online

1. Open or continue your return. Be sure you are logged in for the link in Step 2 to work.
2. Go to K-1.
3. On the Schedules K-1 or Q page, select Yes. ( you will see the option for Form 1120-S her
4. On the Did you receive any Schedules K-1? page, select Yes.
5. Select Start next to the type of Schedule K-1 form you have, and enter your information.

Thanks, that was easy!