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This same issue is occurring for the 2025 tax year. 

 

First, backdoor conversions are incredibly tricky to enter in the Federal Form.  It should be a much simpler process.   TaxFreeUSA, for example, makes this incredibly easy.

 

Second, at least for the State of Massachusetts, backdoor conversions automatically flow to the state return as taxable income.  I thank the above poster for sharing their solution to this, but I wonder how many TT users don't catch this and pay a 5% tax on their backdoor conversions?