C:11-37 and C:11-38. C:11-70. Mashburn Corporation is an S corporation that uses a fiscal year ending June 30 as its tax year. When is Mashburn

C:11-37 and C:11-38. C:11-70. Mashburn Corporation is an S corporation that uses a fiscal year ending June 30 as its tax year. When is Mashburn Corporation"s income tax return due? A. July 15 b. September 15 c. October 15 d. March 15 of the next year b, p. C:11-37.