The IRS won’t ask you to make estimated payments. That’s on you and your circumstance as to whether you should or not.
That’s 100% correct. Freedumb, you’ve said a number of things on this thread which are not correct. You need to get an accountant — and he should review your recent filings. The IRS WILL usually send you quarterly vouchers IF you file Schedule C, but whether they do or not, they WON’T exempt you from penalties because of an error on their part.