There is no upper age limit for writing CEED exam and the eligibility criteria for CEED exam are
Candidates should have passed a degree/diploma/postgraduate degree programme of 4 years or 3+2 years.
Candidates who will be taking the final exam of such programmes by July 2020 or those who have passed GD Arts diploma programme by July 2019 can also apply.
A candidate can appear in CEED any number of times.
As you have a B.com (//B.com) degree you are eligible to write CEED exam. Please click the below link to know the eligibility criteria for CEED https://design.careers360.com/articles/ceed-eligibility-criteria