Yes, but your tuition tax credit will be based on the difference between your tuition and the CTC claimed. For example, if your tuition was $4,000 and you claimed $250 in CTC, your tuition tax credit will use $3,750 for its calculation. Note that when it comes to claiming the CTC, you can only claim the lesser of 50% of eligible training fees paid in a year and your CTC limit for that same year. So, if your tuition is $1,500 and your CTC limit is $1,000, you can only claim $750 for that year (50% of eligible tuition).