When a corporation (S-Corp I presume?) is active and when it's "open for business" are two different things. How each is treated can also depend on the state you registered the business in, as state laws will apply and will affect how you file the federal corporate return.
I hope I'm wrong, but I get the impression that you have not yet filed a 2017 tax return for the corporation (still assuming it's an S-Corp too). If so, then be aware the corporate return was due on March 15 and the late fee is $125 per month, per owner of that S-Corp. So if my assumptions are even close to being right, you need to stop now, get with a CPA or tax attorney in your local jurisdiction and get the *facts* as applied by the laws of your state. Right now, if you are required to file a 2017 corporate return (and I bet you are) you've already incurred a $250 late filing fee just for you as a single owner of the corporation. Those fines, late fees and penalties are not a tax deduction either. There's going to be other fines and penalties also that are going to make the cost of professional help seem like a pittance in comparison. Please get with a professional ASAP, and I hope your business doesn't go under because of this, before it even has a chance to get off the ground.
