Form 6252: Installment Sale Income is an IRS form used to report income from a sale of real or personal property coming from an installment sale.

Rather, it is reported on Part II of Form 4797 (or directly on Form 1040 if Form 4797 is not otherwise needed) where it will reduce ordinary income not subject to self-employment tax.

Form 4797 is for reporting the sale of capital assets, such as equipment your business used to produce goods or sell services to the public.

Form 8379 is used by an "injured" spouse to regain their share of a joint tax refund that was seized to pay a past-due debt of the other spouse.