Reference URL - https://www.quickbookconsulting.net/blog/2018/05/24/quickbooks-support-helps-prepare-file-t4-slip-quickbooks/
You need to file your T4 slips with the CRA and provide it to your employees before the month of February ends every year. You can now file T4 slips online through the CRA website. Also, you can print the T4 slips printed along with a summary and file paper copies with CRA.
QuickBooks support reminds you on the pay tax pages when the T4 slips are due to produce.

Prepare T4 slips for employees with the help of QuickBooks support
On the QuickBooks desktop, move to the navigation bar. In the navigation bar click on taxes, a drop down menu box will appear, click on payroll tax. After which you need to click on Annual forms. Select the type of form you need to create. Then click on T4 (employee) so that you can prepare a T4 slip for your employees. Now to view the slip click on VIEW your slip will open in adobe acrobat. Check and make sure that all the information on the slip is correct. If no errors are found take print of all your slips and distribute it among your employees before the end of February. And the task is done!

How to prepare T4 slips and summary with the CRA
Go to the navigation bar and select taxes, from the drop down menu box select payroll tax. Select annual forms after selecting annual forms select the type you need. Now to prepare an employer copy of all your T4 slips which are to be submitted to the CRA click on T4 slip (employer) and to prepare a summary of remuneration paid click on T4 summary. Now to view the summary and the slip click on view both the pages will open in adobe acrobat window. Now print the forms and close the adobe acrobat window. To save a copy of the form click on ARCHIVE, a copy will be saved. After taking out the print outs send your T4 slip and the summary to the CRA.
How to prepare T4 slips online with the CRA
Before you start to file T4 slips online, you need to enter your transmitter number on the Federal Tax page of your payroll settings. Now, click on the gear icon to get an access of your payroll settings. Enter 555555, if in case you don’t have your transmitter number.

Now to prepare T4 slips online with the CRA click on taxes on the navigation bar and then click on payroll tax. In the next step, click on annual forms. Now to prepare an employer copy of all your T4 slips which are to be submitted to the CRA click on T4 slip (employer).To view the form click on VIEW on the page form and the form will open in adobe acrobat. Check and make sure all the information entered is correct and then close the window. In the T4 window click on submit the form will be saved. Now download your slip as an XML file by following the directions on the screen and upload the file to the CRA website.
If you are facing any issue related to QuickBooks accounting software just dial our QuickBooks support number 1-855-441-4436.