When a taxpayer files for EITC based on earned income from Schedule C, their Tax Professional must:

a. Attach documentation of their income and expenses to the tax return

b. Prepare the return in a way which is disadvantageous to the taxpayer

c. Document all questions they asked the taxpayer, and all of the taxpayer's responses

d. Document the questions and the client's answers pertaining to the income that is advantageous for EITC