If you have changed brokers, added or made changes to accounts already with your broker; or if you hold units with more than one brokerage firm, you will receive a yellow worksheet for the units held with each firm. Sometimes if brokerage firms have merged, the information is not merged together into one system. All of the above scenarios can result with you receiving more than one yellow worksheet. Usually if you add the worksheets together, it will equal the total units you own for the period your records show you owned those units. If adding the yellow worksheets together does not match the information in your records, then use your records and the tax booklet to calculate your proportionate share of the trust income.