You may receive a letter from CRA regarding your GST/HST benefits and Climate Action Incentives and CRA may ask your world income to calculate your benefits amount in following situations:
You filed income tax return first time after your arrival/landing in Canada.
Your marital situation changed and you added your spouse in your tax return but your spouse is not in Canada yet.
You can send RC151 form and a letter to CRA to provide your or your spouse's world income. Download RC151 form from here and send it to your nearest tax centre.