Probably same situation as mine where pension income is lower than taxes because most of pension income is from non registered plan and taxes withheld on pension and non registered can't be split. I prorated the taxes between pension and n0n registered and added the excess taxes as installments.
Most of pension income comes from non registered pension so taxes are actually higher than pension income on T4A. This causes a rejection for Netfiling after pension income splitting. Is there a solution?