Dear Sir,
a. You can certainly show your loss in income tax return this year and claim this loss against profits of subsequent years upto 8 years.
You will have to prepare profit and loss account and balance sheet properly. For eg. purchase of laptop will not form part of revenue Expense, it will be capital asset and depreciation on the same shall be revenue expenses.
b. For income tax purpose there is no requirement of registration. you only need to obtain PAN. For vat purpose, limit depends upon your state law. Vat may not be applicable to you. For service tax, you need to obtain registration, once your taxable services exceeds 9 lac in a year.
For any help on the above matters, you can reach out to us.
Regards,
CA Abhishek Dugar