Can I adjust T4

Hi masmeding,

It's nice to see you in Community.  Welcome!  It's essential that your numbers are accurate in QuickBooks Online Payroll to ensure a positive outcome on your T4 slips.  I'd be glad to help!

I suggest contacting us outside of Community.  Our Customer Care team can work with you directly and assist you with adjustments and corrections as soon as possible.

Schedule a Callback or start a Chat: click (?) Help in the upper right in QuickBooks Online > enter "Contact support" > hit Contact Us > provide a brief summary of your situation > hit Let's Talk > choose Get a callback or Start a Chat.
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Feel free to reach back out with other questions.  We're always happy to assist!