To wWhom may it cIt May Concern,: To Whom It May Concern:

This is the way I was taught to address business letters. In an email, it should be fine to say, "To whom it may concern,"

I amhave been an accountant for 13 years. I have been an accountant for 13 years.

I amhave been an accountant for 13 years. I have been an accountant for 13 years.

"Have been" is used to indicate that you have been in a certain state for a certain amount of time. "I have been hungry all day" "I've been a student for years now" "I have been an accountant for 13 years" "I am" is not used with a time phrase at the end. "I am" is used for your current state, but not your past state. "I am an accountant" (correct) *I am a university graduate since 2018. (wrong) "I have been a university graduate since 2018" (correct)

Throughout my career, I started working as an accountant in a local, small accounting firm, and later on kept working forworked at international companies. I started working as an accountant in a local, small accounting firm, and later on worked at international companies.

"Throughout my career" would normally mean something you did your entire career. For example, a skill that you used at multiple employers.

Throughout my career, I startedI began my career by working as an accountant in a local smalsmall, local accounting firm, l. Later on kept, I started working for international companies, and have kept doing so since. I began my career by working as an accountant in a small, local accounting firm. Later on, I started working for international companies, and have kept doing so since.

Small goes before local (in English, adjectives must be ordered in a certain way before nouns). I understand you're trying to emphasise you've always been an accountant. You can use this construction for that: [Time in the past] I started [Verb]ing, and have [Verb]ing since. The important thing is [Past] [Subject] [Verb], have [Verb] since. The "since" at the end indicates an ongoing action. Examples: Last time I was in France, I fell in love with the city. I have thought about going back since. The shop closed down a few months ago, and I have been struggling to pay rent since. Four years ago I started raising my son, and have worked hard to save money for the family since. You said goodbye to me last summer. I haven't visited that cafe since.

I currently work for a company which is Türkiye'sthat is the Turkish branch of a USA based entity. I currently work for a company that is the Turkish branch of a USA based entity.

In English, we write the country name as "Turkey." You could say "Turkey's branch", but it is more natural to say "Turkish."

I cCurrently, I work for a company which is Türkiye'sthe Turkish branch of a USA based entity. Currently, I work for a company which is the Turkish branch of a US based entity.

We do use Türkiye as the country name, but many people still don't know about the official change yet. In this sentence, you'd be better off using "Turkish branch" because you want an adjective, and then a noun. "Türkiye's branch" does not sound as natural.