Most of the time yes. A box 5 amount would indicate that it might not be.
If you made periodic payments from a qualified
plan and the annuity starting date is after
November 18, 1996, you must use the simplified
method to figure the tax-free amount each year. See
Annuity starting date in 1998 or later, earlier.
If a total distribution is made, the total employee
contributions or insurance premiums available to be
recovered tax free must be shown only in box 5. If any
previous distributions were made, any amount recovered
tax free in prior years must not appear in box 5.
For payments of reportable death benefits, enter your
estimate of the buyer’s investment in the contract in box 5.
