I am unable to enter this year's Leasehold additions to the CCA  for Leases form under my existing lease. My computer only shows columns for  Additions #1, #2, #3 and does not allow me to go to column #4. If I enter the current years information as a new lease, then it shows the correct carry forward figures from the prior years lease entries but it doesn't display the total CCA for the year and puts two Class 13 onto the Schedule 8. How can I access more columns under the existing lease to enter this years additions?