My tax refund was less than quoted on TurboTax, by nearly $600. Do they send returns in increments to your account.

No, they would send your full tax refund to you in one transaction. You can check your notice of assessment to see what the CRA changed on your return.

Perhaps it was not my tax refund and another payment? because I never got an email saying that my refund was completed, from the CRA.

You may wish to verify your MyAccount to see the progress of your refund or call the Canada Revenue Agency (CRA) at         1-800-959-8281.

Thank you for choosing TurboTax.