I am stationed overseas, and I have received a letter about my taxes. Can you handle my tax return problem with the IRS?

I can't understand what the letter is telling me about my taxes. Are you able to explain in simple English what they are saying? 

I work for myself and take deductions, now I recieved a letter telling me I did not file correctly. Can you help me get this corrected?

I used a computer tax program to complete and file my taxes. I now am getting letters about errors in my filing, is that something you can help me fix?

​You are also a tax preparer; can you do my taxes though I live in a different state?