February 1st, 2021 - Deadline for Wealthsimple to provide 1099-R and 1099-Q Tax Slips (You're given one if you withdrew funds from your IRA account)
February 4th, 2021 - Deadline for Wealthsimple to provide 1099B, 1099 DIV, 1099 INT, 1099 MISC, 1099 OIC REMIC Tax Slips
May 17th, 2021 - Deadline to file personal income taxes (if you haven't filed for an extension)
May 17th, 2021 - Last day contributions to IRAs are eligible for the 2020 year
June 1st, 2021 - Deadline for Wealthsimple to provide 5498 Tax Slips (Confirms the amount contributed to an IRA for the 2019 tax year)
October 15th, 2021 - Deadline to file personal income taxes only if you successfully filed for an extension

Learn more about tax slips here!