The box 2a on my 1099r is $0 but I think I owe taxes on the full amount of the 401k to Roth IRA conversion, is that right? Should I just change that number in box 2a?

The section 2a is $0 on the 1099 but I watched videos on YT and I think I need to change it in Turbo Tax to the full distribution amount.

Does that sound right?