No, only at the start of the sentence.
Yes, "Accountant" should be capitalized when used as a title or job role (e.g., Senior Accountant).
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'.
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
the qualified accountant should be honest and should have a good reputation and they should be well behaved.
Yes, you should capitalize the C in Century.
You should capitalize it if it is a brand name.
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.
No, the word "accountant" should not be capitalized unless it is at the beginning of a sentence or in a title.
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.