Canada Revenue Agency's page with information on topics and services specifically for seniors. It provides information to topics such as tax return, type of income of seniors, credits for seniors,Pension income splitting, RRSP, Registered Retirement Income Fund (RRIF), Tax-Free Savings Account (TFSA),Canadian residents going down south, Non-resident seniors, Tax treaties, Old age security (OAS) benefits repayment, Canada Pension Plan (CPP) contributions for CPP working beneficiaries and many more. Visit the website for more information related to Canadian seniors.
Note, CRA and Government Canada have provisional offices across Canada. Please visit their websites for locations and more information.