It depends a few factors, including whether the distribution is from a qualified or non-qualified annuity and how long between the distribution and the replacement annuity.
A qualified annuity is one that is in a tax-deferred retirement account like a 403(B) or an IRA. If your annuity was a qualified annuity and it was deposited into a qualified retirement account within 60 days, it can be treated as a rollover. Click here to learn about reporting a rollover.
If your annuity is a non-qualified annuity (not in a retirement account of any kind), the amount in box 2a of Form 1099-R is taxable regardless of where the money ended up.
It is possible to exchange one annuity for another with out paying taxes, but the exchange must happen directly between insurance companies. You can't take the distribution and then find a new annuity later.
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