I have a client that I picked up that sold their business in 2024.  The accountant that they used figured 100% of their Capital Gain for the business and they paid that to the IRS.  The accountant, also, issued a 6252 Installment Sale Income form.  The buyer is paying for the business in installment loan payments with interest.  I have already researched, and I know I have to include the interest as income on schedule B.   Do I need to continue to file the 6252 each year which includes their principal payment which does not cause their tax liability to change.  Please note again, I am including the interest which is taxable.   The basis question is I do need to continue to include the 6252 form each year until this Installment loan is paid off, correct?