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@Kevin1 wrote:

I can't see why SBA allow the 2019 C income as the reference for forgivable income - completely a different company.       

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Offhand I don't remember the actual rules, but it makes sense to me.  The bank is using that as a reference for a loan.

If it is the same (or similar) business activity, the profit of the Schedule C is sort-of the equivalent of  wages for the corporation owner/shareholder/employee.  Yeah, it is going to be different, but it was only for a reference for a loan because there really wasn't anything else to reference. The actual forgiveness will depend on the actual situation and wages.