No, only at the start of the sentence.
No, because it isnot a propernoun.
Only if you have a very dumb accountant
First of all, 'CPA' is not a word. If you're referring to 'Certified Public Accountant', then yes, you would capitalize 'CPA'.
Yes, you should capitalize "About" in a title.
Acronyms are always capitalized to distinguish them from ordinary words in the sentence, this is most important when the acronym is a word (IE WHO- World Health Organization as opposed to 'who'). You do not capitalize the individual words when spelling out the phrase UNLESS it is a proper noun. World Health Organization is capitalized, certified public accountant is not, United Nations is, unidentified flying object is not.
I dont think you should be an accountant
Yes, you should capitalize the C in Century.
No, you should not. You should only capitalize a word when it is at the start of a sentence or when it is a proper noun.
the qualified accountant should be honest and should have a good reputation and they should be well behaved.
Yes, you should capitalize "The Rotunda" as it is a specific place or location.
You should capitalize Colosseum when referring to the specific ancient Roman amphitheater in Rome.
no