Can the doshas that we incur in the day to day life for leading a path opposite to what is written in the Shastras be washed away completely by uttering Naama?

100%! Certainly! There is no doubt about it. You can take my word for it.

Does the Rama Nama in the Mahamantra denote Lord Ramachandra or Balarama?

It denotes both of them.

Why is ‘Aum’ not included in Mahamantra? Is it because its efficacy is already in the Mahamantra? Does Mahamantra represent all the three states (viz. wakefulness, dream and deep-sleep) that ‘Aum’ represent?

Whatever importance is accorded in the Vedanta to the ‘Aum’ syllable is accorded to the ‘Rama’ Nama in Bhakti Shastras.

Can Mahamantra be written (like Rama Nama)?

Definitely. Do it.

Do we not need a formal initiation for the Maha Mantra? I hear and read that initiation from a Guru is indispensable for one to take up a Nama and chant it incessantly and thereby attain liberation, as while initiation, the Guru transfers a part of his spiritual powers to the disciple which creates a spiritual awakening in him. So without initiation, am I without any hope for liberation?

For the un-initiated, it is important to be initiated. However, you do not need to wait until you get initiated by a proper Guru. You can start chanting the Maha Mantra. In due course, the merciful Lord will definitely send a Guru at an apt time. At that time, you can take the Mantra from Him.

Is it right to Chant the Maha Mantra using the Japa Mala or we should chant it like the Kirtan?

You can chant the Maha Mantra either way. Whether you perform Nama Kirtan or chant it with japa mala, you should do it with love and devotion. That is the most important criteria.

I chant the Mahamantra only when I am unable to bear the suffering in my life. I never feel Bhakti or love towards Krishna. Will Krishna help me?

Most certainly. You come to Krishna only even for mundane worldly matters. He is your father, mother, friend, philosopher, Guru, guide and well-wisher. He loves you so much – much more than you love yourselves.

I know only Maha Mantra. Is it enough if I just chant this alone to reach His abode?

You are really fortunate to know only the Maha Mantra. Ignorance of other diverse forms of worship or other Mantra Sadhanas is indeed a boon and fortune, as they distract a Sadhak from concerted efforts. Concentration on chanting the Maha Mantra alone is enough. Catch hold of it. It is more than sufficient to take you to his abode.
Great mahatmas like Bhagavan Ramana who worshipped the Arunachala Mountain as Lord Siva, Seshadri Swamigal who worshipped Sri Krishna – all have worshipped only one form of God. Since Nama (the name of the God) and the Naami (the Named, who is the Lord Himself) are one and the same, chanting the Maha Mantra day and night, all the time will certainly lead one to liberation without an iota of doubt. So continue chanting the Maha Mantra alone and Lord Krishna will take you unto His fold.

I want to chant the Maha Mantra always. In the workplace I am not able to chant properly due to my work load. Still I think about Krishna. Please let me know a solution by which I can chant the Maha Mantra always.

Chant it during your off-office hours. In due course, the Lord will enable you to chant it in your mind and still carry on with your work. You are indeed blessed to reminisce Krishna always. The lovable Lord Krishna will fill your heart with abundance of eternal pure love (‘prema’).

I get confused as to which God’s name I need to chant. There are so many gods in our religion and hence so many Names. I used to chant the Shiva Nama and after reading Bhagavatam and Bhagavat Gita, I chant the Mahamantra. Please clear my confusion.

Do not confuse yourself. You are the child of Krishna. Chant the Mahamantra and that is enough. You can also take this as the initiation. Continue to chant the Mahamantra and you will see for yourself how Krishna brings auspiciousness and happiness into your life.