Some payers think that a blank entry is the same as a zero entry, but in box 2a is not. This is one such payer who mistakenly omitted the zero from box 2a. A Form 1099-R with codes B and G in box 7 is never taxable.
Even though the payer mistakenly left box 2a blank (an improper way to indicate that the rollover is nontaxable), TurboTax knows to treat as nontaxable a distribution reported on Form 1099-R with codes B and G in box 7.
