I have scaled back my business starting for tax year 2021 and will be switching from ProSeries Professional to Basic for most returns. I will still have one 1120-S return and was told I can use Professional on a pay-per-return basis for that.

Will I be able to load both versions (Basic and Professional) on the same computer simultaneously?

Or will I need to uninstall Basic, then install Professional when needed?

Or use 2 computers - one with Professional and one with Basic?

Thanks in advance.