IDK But is it that complicated a return?

Not too complicated.

W2

Schedule C

For the amendment they need to add a K1 

Here is a link, also post your question "can I export taxslayer to proseries" in the ask "yellow box on top right".

https://accountants.intuit.com/support/en-us/help-article/other-articles/taxslayer-backup-instructio...

For the record, the conversions convert the old software to the new by taking the prior year and converting it to the current.  So you can convert it, but I don't think you are going to get what you were hoping for.

Then type it in.