DEAR SAVVY SENIOR: What are the IRS income tax filing requirements for retirees this tax season? My income dropped way down when I retired last year in 2016, so I’m wondering if I need to even file a tax return this year.

— New Retiree

DEAR NEW: There are several factors that affect whether you need to file a federal income tax return this year, including how much you earned last year (in 2016), the source of that income, as well as your age and filing status.

Here’s a rundown of this tax season’s (2016) IRS tax filing requirement thresholds. For most people this is pretty straightforward. If your 2016 gross income — which includes all taxable income, not counting your Social Security benefits, unless you are married and filing separately — was below the threshold for your filing status and age, you probably won’t have to file. But if it’s over, you will.

>> Single: $10,350 ($11,900 if you’re 65 or older by Jan. 1, 2017)

>> Married filing jointly: $20,700 ($21,950 if you or your spouse is 65 or older, or $23,200 if you’re both over 65)

>> Married filing separately: $4,050 at any age

>> Head of household: $13,350 ($14,900 if age 65 or older)

>> Qualifying widow(er) with dependent child: $16,650 ($17,900 if age 65 or older)

To get a detailed breakdown on federal filing requirements, along with information on taxable and nontaxable income, call the IRS at 800-829-3676 and ask them to mail you a free copy of the “Tax Guide for Seniors” (publication 554), or see irs.gov/pub/irs-pdf/p554.pdf.

SPECIAL CIRCUMSTANCES

There are, however, some other financial situations that will require you to file a tax return, even if your gross income falls below the IRS filing requirement. For example, if you had earnings from self-employment in 2016 of $400 or more, or if you owe any special taxes to the IRS such as alternative minimum tax or IRA tax penalties, you’ll probably need to file. To figure this out, the IRS offers an interactive tax assistant tool on their website. You can access this tool at irs.gov/filing — click on “Do you need to file a return?” under the “Get Ready” section. Or, you can get assistance over the phone by calling the IRS help line at 800-829-1040. You can also get face-to-face help at a Taxpayer Assistance Center. See irs.gov/localcontacts or call 800-829-1040 to locate a center near you.

CHECK YOUR STATE

Even if you’re not required to file a federal tax return this year, don’t assume that you’re also excused from filing state income taxes. The rules for your state might be different. Check with your state tax agency before concluding that you’re entirely in the clear. For links to state tax agencies, see taxadmin.org/state-tax-agencies.

TAX PREP HELP

If you find that you do need to file a tax return this year, you can get help through the Tax Counseling for the Elderly (or TCE) program. Sponsored by the IRS, TEC provides free tax preparation and counseling to middle- and low-income taxpayers age 60 and older. Call 800-906-9887 or visit irs.treasury.gov/freetaxprep to locate a service near you.

Also check with AARP, a participant in the TCE program that provides free tax preparation at more than 5,000 sites nationwide. To locate an AARP Tax-Aide site call 888-227-7669 or visit aarp.org/findtaxhelp. You don’t have to be an AARP member to use this service.

Jim Miller is a contributor to NBC-TV’s “Today” program and author of “The Savvy Senior.” Send your questions to Savvy Senior, P.O. Box 5443, Norman, OK 73070; or visit savvysenior.org.