Just apply to as many places as you can. Even if they ask for experience, lie a bit on your resume. Once you get the internship, work hard and learn as much as possible. That’s how you gain experience.

Service tax paid should be treated as an operating expense in the financial statements. You can either show it as a separate line item under operating expenses or you can allocate it to the respective expense heads under which it was incurred. Both treatments are acceptable as per accounting standards.