The Form DP-10, Interest and Dividends Tax Return Instructions, on page 3, Line 2 states:
Enter any taxable annuities or the actual cash or property distributions you received or constructively received from any of the taxable income classes described in RSA 77:4. These distributions are subject to tax in New Hampshire as a "dividend". Taxable annuities are those annuities not invested in a tax-deferred investment plan pursuant to RSA 77:4-b.
Per TITLE V TAXATION CHAPTER 77 TAXATION OF INCOMES Section 77:4-b:
77:4-b Interest and Dividend Income of Employee Benefit Plans and Tax Deferred Investments Not Taxable. – Notwithstanding any provisions of RSA 77:4 to the contrary, interest and dividend income received by an employee benefit plan as defined by the Employee Retirement Income Security Act of 1974, section 3, or any successor act enacted for the purpose of regulating employee benefit plans, or an individual retirement arrangement, Keogh plan or any other arrangement pursuant to which payment of federal tax on the income thereof and of the plan sponsors, participants and beneficiaries is deferred, shall at no time be considered taxable income under RSA 77:4, either to the plan or arrangement or to its sponsors, participants or beneficiaries, irrespective of when or whether all or any portion of such income is accumulated or expended for the benefit of, or distributed in any form or manner to, such sponsors, participants or beneficiaries.
If your annuity qualifies as non-taxable under these rules, it would not be entered on Line 2.
Note that any link in the information above is updated each year automatically and will take you to the most recent version of the document at the time it is accessed.