In 2016, why did TurboTax change my EI premiums (line 312) from what I entered?

[therks]

Reviewing my return for 2016, I noticed that TurboTax changed what I entered for EI premiums. I entered $840 but the generated T1 had $750. Is there some reason for this, or was this a bug in the site?

[TurboTaxJennifer]

Do you have an amount for line 450 of your T1 General?

[therks]

Ah yes, that makes up the difference. Thank you. And sorry it took me so long to reply.

[TurboTaxJennifer · Accepted solution]

If you've over-contributed to EI during the year, only the portion that matches your income will appear on line 312. Your overpayment will appear as a refundable amount on line 450.