For Canada Revenue Agency filing and payment due dates see here 

Complex tax situations are not supported - volunteers will not complete a deceased taxpayer's return, or returns that have any of the following:

• self-employment income or employment expenses
• business income and expenses
• rental income and expenses
• interest income over $1,200
• capital gains or losses
• bankruptcy in the tax year (or the year before, if that return has not yet been filed)
• foreign property (Form T1135)
• foreign income

Where to get tax forms: online, by mail or call the automated phone line Mon-Sun 6 am-3 am at 1-855-330-3305 
 
Tax filing online: only CRA-certified software may be used, see list here

Toll Free Canada Revenue Agency general income tax inquiries 1-800-959-8281

YEAR-ROUND FREE ASSISTANCE: 

Canada Revenue Agency

• toll-free 1-800-959-8281 
• provides assistance for completed/filed tax returns and general tax questions

Community Tax Clinic, 4145 North Service Rd, Burlington

• 289-427-0142 or email info@mfscommunity.ca  
• provides assistance with filing current and last year returns

Oak Park Neighbourhood Centre, 2200 Sawgrass Dr, Oakville

• 905-257-6029 ext 103 or email taxes@opnc.ca
• provides assistance with filing current and prior year returns
• serves all of Halton

Hours vary, contact for more information

For persons with a modest income and simple tax situation

• in general total family income limits are $40,000 for individuals, $55,000 for couples, and varying levels for families, based on number of dependants
• for more information see here, or call Canada Revenue Agency 1-800-959-8281

To volunteer in the Community Volunteer Income Tax Program see here

For community organizations offering space see here