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"If '23 loss does not impact net taxable",

It's unclear how you can have a loss and net taxable.

 

example multiple debts

Debt basis in situations where there is multiple indebtedness requires a shareholder to allocate losses in excess of stock basis proportionately. Assume the following fact pattern: Shareholder Z holds four notes of an S corporation; tax basis at beginning of year (reduced basis due to prior losses). the first note is $1K, the second $2k, third $3K, and fourth note $4K. There are no payoffs of these notes during the year. The company has a $6,000 loss in excess of stock basis. 

note 1 further reduced by 1/10 *6 or $600

note 2 further reduce by 2/10* 6  0r $1,200 an so on

 

your post is confusing so please provide more details. 

 

I don't see how losses can ever restore debt basis.