The SCDOR accepts electronically-filed amended returns. Check with your software provider to be sure their products can file amended returns. If you're filing electronically, the Schedule AMD will be included as part of the electronic return process.
https://dor.sc.gov/resources-site/media-site/Pages/How-and-when-to-amend-your-SC-Individual-Income-T...
Starting with tax year 2019, amended returns can be filed electronically. Check with your tax preparer or tax software provider to determine if they support electronic filing of amended returns.
https://dor.sc.gov/tax/individual-income/faq
