Gain on Repossession

There are other threads that cover this topic but I cannot figure out how to actually report the gain on repossession of real estate after a cancelled installment sale.  The original sale was reported on both the Form 6252 and 4797 (fed from the 6252).  There is nowhere in the TurboTax installment sale section (that I can find) to report that the installment sale was cancelled.  It does not generate a form 4797 when I report no income on the installment sale for 2020 so I can't go into the 4797 and override it.  I filled out the IRS worksheets to calculate the taxable gain and basis of repossessed real property, I just can't figure out where or how to report the gain in TurboTax.