"you told us zero of your retirement is taxable." Asking for amount in box 2a on 1099-R form. box 1: $1601.16 and "unknown" in box 2a. What do I put for box 2a?

[JohnW15]

Please see the TurboTax FAQ below for guidance when Box 2a of your 1099-R is either blank, "0" or "Unknown."

"Is my distribution nontaxable if Box 2a on my 1099-R is "0" or blank?"

https://ttlc.intuit.com/replies/3300757