Well...if you're lucky, the IRS will reject your e-file for some reason, later this month...then you'll just edit it and re-e-file.
Otherwise, amending isn't available until after mid February....if "Accepted" you'll need to either pay what's due on the original, or wait for the original refund, before you prepare the amendment (state too).
Make sure you save a full copies of the original before you amend.....as PDF files. Both the Filing-Only Copy, and the extended copy with all forms and worksheets. (after amending.....the original is GONE)
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
