SSTD or SSTB? An SSTB is a specified service trade or business. This has to do with Qualified Business Income Deduction. So if you entered self-employment income or in some situations a Schedule K-1, you will be asked if your business is one of these to determine if you qualify for the 20% QBI deduction.
Is my business an SSTB?
If you are seeing a SSTD, please provide more detail as to where you are seeing this?