So I have the same similar situation, but the amount was previously converted. AS it seems in publication 509, the order of distribution is converted amount first, then earnings. 

However, even with Code T, zero taxable amount, it still or even if i put box 5 contribution for same amount of distribution, it is still being taxed? 

Is my only option now to use Code 7 instead so it's not taxable since it is return of contribution?