You indicate this is a Delaware C Corp so check corporation and you will file Form 1120.Check that you are starting a new corporation.Date business started is the date you actually started the business.u00a0 Typically you would look on the paperwork from Delaware and put the date of incorporation.December is the standard closing month for most corporations. Unless you have a significant business reason to pick a different month use Dec.If you plan to pay yourself wages put one.u00a0 If you don't know put zero.Unless you are fairly sure you will owe payroll taxes the first year check that you will not have payroll or check that your liability will be less than $1,000. Anything else and the IRS will expect you to file quarterly payroll tax returns.Indicate the type of SaaS services you will offer.