Can you amend a 1040 to switch from schedule c to 1120s?

[Csbs]

Can an amendment be done on a 1040 that filed a schedule C to be replaced with a K-1? I have a new client that has been filing their business return with the a relative using schedule c but they should’ve filed as s-corp years ago. They filed using freetaxusa and I want to file them with ProConnect. I am a new user (2weeks) of ProConnect so I need help navigating this. Thanks!

[IRonMaN]

It can be done, but before you do it, make sure you are doing the correct thing.  Were they running the business as an S corp or were they running it like a schedule C?  Did they pay themselves wages or did they take draws?  Did the IRS ever send a notice looking for a sub S tax return over those years?  Have you seen the approved S election?

[George4Tacks]

Short answer to your question is YES. See @IRonMaN post and review all of the questions to be sure it doesn't get more screwed up. 1st job is to input the 1040 into ProConnect so it EXACTLY matches the 1040 (and state) as originally filed. 

Instructions are here. 

https://accountants.intuit.com/support/en-us/help-search?document_type=Articles&filter=ProConnect+Ta...