Where do I fill in for K9 forms?

You probably mean K-1 forms received from a partnership, S-corp, or trust/estate.

Please make sure you use the right K-1 entry form. There are actually three types of K-1s, depending on the type of entity creating the K-1: partnership, S-corporation and trust/estate.  Lines and codes on the forms differ from each other.

Enter information for the Schedule K-1, following these steps:

1. Click on Federal Taxes > Wages & Income [In TT Self-Employed:  Personal > Personal Income > I'll choose what I work on]. 
2. Under Other Business Situations, click on the box next to Schedules K-1, Q.  [Screenshot #1, below.]
3. Click Yes on the next screen, Schedules K-1 or Q.  
4. On the Tell Us About Your Schedules K-1 screen.  Click on the Start/Update box next to the type of entity (partnership, S-corporation, or trust/estate) that issued the K-1.   [Screenshot #2]
5. If you have already entered K-1 information, you will see a Summary screen.  Click Add Another K-1 to enter your information  (or click on Edit to continue with the existing form entry).  [Screenshot #3]
6. If you haven't started entering K-1 information, continue through the screens, entering the requested information.

Which TurboTax package should I purchase to file a K9 partnership form?

You will need TurboTax Business to file a partnership return.