In turbotax, it only has option to enter 1 college. What if my kid went to city college and in the fall transferred to a 4 year college? where do I enter second college? Can I claim dorm fees?

Yes, you can add a second school on the "Here's Your Education Summary" screen in the Education Section under Deductions & Credits

 

Dorm fees cannot be used towards a credit. 

An option to enter Room and Board is only available if you enter a 1099-Q for a 529 or other Education Savings Account distribution since the distribution CAN be allocated to Room and Board. 

 

IF a distribution is entered (Form 1099-Q) Room and Board may be reported in the "Other Education Expenses (for all schools)" by selecting Yes to "Did You Pay for Books or Materials to attend school?"