What are estimated tax payments and extension payments?
Estimated tax payments include:
- Any estimated tax payments you made for 2018 with Form SC1040ES
- Any refund from your 2017 return that you applied to your 2018 taxes
An extension payment
is any amount paid with your South Carolina extension request.
Do NOT enter any amount of your 2018 South Carolina income tax withheld by your employer(s) as shown on any wage or tax statements.