For Canada Revenue Agency filing and payment due dates see here 
 
Volunteers Clinics do not complete returns for tax situations involving any of the following:

• self-employment income or employment expenses
• business income and expenses
• rental income and expenses
• interest income over $1,000
• capital gains or losses
• bankruptcy in the tax year (or the year before, if that return has not yet been filed)
• deceased person
• foreign property (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

Year-round Income Tax Assistance:

Oak Park Neighborhood Centre

• free year round assistance with Income tax completion for low income residents of the Halton Region
• for more information visit listing OAK0360

 
Canada Revenue Agency can provide some assistance by phone, toll-free 1-800-959-8281 

Call for information

• in general total family income limits are $35,000 for individuals, $45,000 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